1naresh<pre>Array
(
    [urn:ac.highwire.org:guest:identity] => Array
        (
            [runtime-id] => urn:ac.highwire.org:guest:identity
            [type] => guest
            [service-id] => ajnr-ac.highwire.org
            [access-type] => Controlled
            [privilege] => Array
                (
                    [urn:ac.highwire.org:guest:privilege] => Array
                        (
                            [runtime-id] => urn:ac.highwire.org:guest:privilege
                            [type] => privilege-set
                            [privilege-set] => GUEST
                        )

                )

            [credentials] => Array
                (
                    [method] => guest
                )

        )

)
1naresh<pre>Array
(
    [urn:ac.highwire.org:guest:identity] => Array
        (
            [runtime-id] => urn:ac.highwire.org:guest:identity
            [type] => guest
            [service-id] => ajnr-ac.highwire.org
            [access-type] => Controlled
            [privilege] => Array
                (
                    [urn:ac.highwire.org:guest:privilege] => Array
                        (
                            [runtime-id] => urn:ac.highwire.org:guest:privilege
                            [type] => privilege-set
                            [privilege-set] => GUEST
                        )

                )

            [credentials] => Array
                (
                    [method] => guest
                )

        )

)
1naresh<pre>Array
(
    [urn:ac.highwire.org:guest:identity] => Array
        (
            [runtime-id] => urn:ac.highwire.org:guest:identity
            [type] => guest
            [service-id] => ajnr-ac.highwire.org
            [access-type] => Controlled
            [privilege] => Array
                (
                    [urn:ac.highwire.org:guest:privilege] => Array
                        (
                            [runtime-id] => urn:ac.highwire.org:guest:privilege
                            [type] => privilege-set
                            [privilege-set] => GUEST
                        )

                )

            [credentials] => Array
                (
                    [method] => guest
                )

        )

)
1naresh<pre>Array
(
    [urn:ac.highwire.org:guest:identity] => Array
        (
            [runtime-id] => urn:ac.highwire.org:guest:identity
            [type] => guest
            [service-id] => ajnr-ac.highwire.org
            [access-type] => Controlled
            [privilege] => Array
                (
                    [urn:ac.highwire.org:guest:privilege] => Array
                        (
                            [runtime-id] => urn:ac.highwire.org:guest:privilege
                            [type] => privilege-set
                            [privilege-set] => GUEST
                        )

                )

            [credentials] => Array
                (
                    [method] => guest
                )

        )

)
1naresh<pre>Array
(
    [urn:ac.highwire.org:guest:identity] => Array
        (
            [runtime-id] => urn:ac.highwire.org:guest:identity
            [type] => guest
            [service-id] => ajnr-ac.highwire.org
            [access-type] => Controlled
            [privilege] => Array
                (
                    [urn:ac.highwire.org:guest:privilege] => Array
                        (
                            [runtime-id] => urn:ac.highwire.org:guest:privilege
                            [type] => privilege-set
                            [privilege-set] => GUEST
                        )

                )

            [credentials] => Array
                (
                    [method] => guest
                )

        )

)
1naresh<pre>Array
(
    [urn:ac.highwire.org:guest:identity] => Array
        (
            [runtime-id] => urn:ac.highwire.org:guest:identity
            [type] => guest
            [service-id] => ajnr-ac.highwire.org
            [access-type] => Controlled
            [privilege] => Array
                (
                    [urn:ac.highwire.org:guest:privilege] => Array
                        (
                            [runtime-id] => urn:ac.highwire.org:guest:privilege
                            [type] => privilege-set
                            [privilege-set] => GUEST
                        )

                )

            [credentials] => Array
                (
                    [method] => guest
                )

        )

)
1naresh<pre>Array
(
    [urn:ac.highwire.org:guest:identity] => Array
        (
            [runtime-id] => urn:ac.highwire.org:guest:identity
            [type] => guest
            [service-id] => ajnr-ac.highwire.org
            [access-type] => FreeToRead
            [privilege] => Array
                (
                    [urn:ac.highwire.org:guest:privilege] => Array
                        (
                            [runtime-id] => urn:ac.highwire.org:guest:privilege
                            [type] => privilege-set
                            [privilege-set] => GUEST
                        )

                )

            [credentials] => Array
                (
                    [method] => guest
                )

        )

)
<!DOCTYPE html>
<html lang="en" dir="ltr" 
  xmlns="http://www.w3.org/1999/xhtml"
  xmlns:mml="http://www.w3.org/1998/Math/MathML">
  <head prefix="og: http://ogp.me/ns# article: http://ogp.me/ns/article# book: http://ogp.me/ns/book#" >
    <!--[if IE]><![endif]-->
<link rel="dns-prefetch" href="//securepubads.g.doubleclick.net" />
<link rel="dns-prefetch" href="//scholar.google.com" />
<link rel="dns-prefetch" href="//www.google.com" />
<link rel="dns-prefetch" href="//cdn.jsdelivr.net" />
<link rel="dns-prefetch" href="//www.googletagmanager.com" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="shortlink" href="/node/14468" />
<meta name="Generator" content="Drupal 7 (http://drupal.org)" />
<link rel="shortcut icon" href="http://ajnr-stage2.stage.highwire.org/sites/default/files/images/favicon.ico" type="image/vnd.microsoft.icon" />
<meta name="issue_cover_image" content="http://ajnr-stage2.stage.highwire.org/sites/default/files/highwire/ajnr/37/5.cover-source.jpg" />
<meta name="type" content="article" />
<meta name="category" content="research-article" />
<meta name="HW.identifier" content="/ajnr/37/5/818.atom" />
<meta name="HW.pisa" content="ajnr;37/5/818" />
<meta name="DC.Format" content="text/html" />
<meta name="DC.Language" content="en" />
<meta name="DC.Title" content="Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide" />
<meta name="DC.Identifier" content="10.3174/ajnr.A4679" />
<meta name="DC.Date" content="2016-05-01" />
<meta name="DC.Publisher" content="American Journal of Neuroradiology" />
<meta name="DC.Rights" content="© 2016 by American Journal of Neuroradiology" />
<meta name="DC.AccessRights" content="restricted" />
<meta name="DC.Description" content="BACKGROUND AND PURPOSE: Changes in cerebrovascular reactivity can be used to assess disease progression and response to therapy but require discrimination of pathology from normal test-to-test variability. Such variability is due to variations in methodology, technology, and physiology with time. With uniform test conditions, our aim was to determine the test-to-test variability of cerebrovascular reactivity in healthy subjects and in patients with known cerebrovascular disease.

MATERIALS AND METHODS: Cerebrovascular reactivity was the ratio of the blood oxygen level–dependent MR imaging response divided by the change in carbon dioxide stimulus. Two standardized cerebrovascular reactivity tests were conducted at 3T in 15 healthy men (36.7 ± 16.1 years of age) within a 4-month period and were coregistered into standard space to yield voxelwise mean cerebrovascular reactivity interval difference measures, composing a reference interval difference atlas. Cerebrovascular reactivity interval difference maps were prepared for 11 male patients. For each patient, the test-retest difference of each voxel was scored statistically as z-values of the corresponding voxel mean difference in the reference atlas and then color-coded and superimposed on the anatomic images to create cerebrovascular reactivity interval difference z-maps.

RESULTS: There were no significant test-to-test differences in cerebrovascular reactivity in either gray or white matter (mean gray matter, P = .431; mean white matter, P = .857; paired t test) in the healthy cohort. The patient cerebrovascular reactivity interval difference z-maps indicated regions where cerebrovascular reactivity increased or decreased and the probability that the changes were significant.

CONCLUSIONS: Accounting for normal test-to-test differences in cerebrovascular reactivity enables the assessment of significant changes in disease status (stability, progression, or regression) in patients with time.

BOLD
:   blood oxygen level–dependent
CO2
:   carbon dioxide
CVR
:   cerebrovascular reactivity
EC-IC
:   extracranial to intracranial
ID
:   interval difference
PaCO2
:   arterial partial pressure of carbon dioxide
PetCO2
:   end-tidal partial pressure of carbon dioxide" />
<meta name="DC.Contributor" content="O. Sobczyk" />
<meta name="DC.Contributor" content="A.P. Crawley" />
<meta name="DC.Contributor" content="J. Poublanc" />
<meta name="DC.Contributor" content="K. Sam" />
<meta name="DC.Contributor" content="D.M. Mandell" />
<meta name="DC.Contributor" content="D.J. Mikulis" />
<meta name="DC.Contributor" content="J. Duffin" />
<meta name="DC.Contributor" content="J.A. Fisher" />
<meta name="article:published_time" content="2016-05-01" />
<meta name="article:section" content="ADULT BRAIN" />
<meta name="citation_title" content="Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide" />
<meta name="citation_abstract" lang="en" content="&lt;h3&gt;BACKGROUND AND PURPOSE:&lt;/h3&gt;
&lt;p&gt;Changes in cerebrovascular reactivity can be used to assess disease progression and response to therapy but require discrimination of pathology from normal test-to-test variability. Such variability is due to variations in methodology, technology, and physiology with time. With uniform test conditions, our aim was to determine the test-to-test variability of cerebrovascular reactivity in healthy subjects and in patients with known cerebrovascular disease.&lt;/p&gt;&lt;h3&gt;MATERIALS AND METHODS:&lt;/h3&gt;
&lt;p&gt;Cerebrovascular reactivity was the ratio of the blood oxygen level–dependent MR imaging response divided by the change in carbon dioxide stimulus. Two standardized cerebrovascular reactivity tests were conducted at 3T in 15 healthy men (36.7 ± 16.1 years of age) within a 4-month period and were coregistered into standard space to yield voxelwise mean cerebrovascular reactivity interval difference measures, composing a reference interval difference atlas. Cerebrovascular reactivity interval difference maps were prepared for 11 male patients. For each patient, the test-retest difference of each voxel was scored statistically as z-values of the corresponding voxel mean difference in the reference atlas and then color-coded and superimposed on the anatomic images to create cerebrovascular reactivity interval difference z-maps.&lt;/p&gt;&lt;h3&gt;RESULTS:&lt;/h3&gt;
&lt;p&gt;There were no significant test-to-test differences in cerebrovascular reactivity in either gray or white matter (mean gray matter, &lt;i&gt;P&lt;/i&gt; = .431; mean white matter, &lt;i&gt;P&lt;/i&gt; = .857; paired &lt;i&gt;t&lt;/i&gt; test) in the healthy cohort. The patient cerebrovascular reactivity interval difference z-maps indicated regions where cerebrovascular reactivity increased or decreased and the probability that the changes were significant.&lt;/p&gt;&lt;h3&gt;CONCLUSIONS:&lt;/h3&gt;
&lt;p&gt;Accounting for normal test-to-test differences in cerebrovascular reactivity enables the assessment of significant changes in disease status (stability, progression, or regression) in patients with time.&lt;/p&gt;" />
<meta name="citation_journal_title" content="American Journal of Neuroradiology" />
<meta name="citation_publisher" content="American Journal of Neuroradiology" />
<meta name="citation_publication_date" content="2016/05/01" />
<meta name="citation_mjid" content="ajnr;37/5/818" />
<meta name="citation_id" content="37/5/818" />
<meta name="citation_public_url" content="http://ajnr-stage2.stage.highwire.org/content/37/5/818" />
<meta name="citation_abstract_html_url" content="http://ajnr-stage2.stage.highwire.org/content/37/5/818.abstract" />
<meta name="citation_full_html_url" content="http://ajnr-stage2.stage.highwire.org/content/37/5/818.full" />
<meta name="citation_pdf_url" content="http://ajnr-stage2.stage.highwire.org/content/ajnr/37/5/818.full.pdf" />
<meta name="citation_issn" content="0195-6108" />
<meta name="citation_issn" content="1936-959X" />
<meta name="citation_doi" content="10.3174/ajnr.A4679" />
<meta name="citation_pmid" content="26846924" />
<meta name="citation_volume" content="37" />
<meta name="citation_issue" content="5" />
<meta name="citation_article_type" content="Research Article" />
<meta name="citation_section" content="ADULT BRAIN" />
<meta name="citation_firstpage" content="818" />
<meta name="citation_lastpage" content="824" />
<meta name="citation_author" content="O. Sobczyk" />
<meta name="citation_author_institution" content="aFrom the Institute of Medical Science (O.S., D.J.M., J.A.F.)" />
<meta name="citation_author_orcid" content="http://orcid.org/0000-0001-8983-1043" />
<meta name="citation_author" content="A.P. Crawley" />
<meta name="citation_author_institution" content="cJoint Department of Medical Imaging and the Functional Neuroimaging Laboratory (A.P.C., J.P., K.S., D.M.M., D.J.M.)" />
<meta name="citation_author_orcid" content="http://orcid.org/0000-0003-4578-7110" />
<meta name="citation_author" content="J. Poublanc" />
<meta name="citation_author_institution" content="cJoint Department of Medical Imaging and the Functional Neuroimaging Laboratory (A.P.C., J.P., K.S., D.M.M., D.J.M.)" />
<meta name="citation_author_orcid" content="http://orcid.org/0000-0001-8377-9846" />
<meta name="citation_author" content="K. Sam" />
<meta name="citation_author_institution" content="bDepartment of Physiology (K.S., J.D., J.A.F.), University of Toronto, Toronto, Canada" />
<meta name="citation_author_institution" content="cJoint Department of Medical Imaging and the Functional Neuroimaging Laboratory (A.P.C., J.P., K.S., D.M.M., D.J.M.)" />
<meta name="citation_author_orcid" content="http://orcid.org/0000-0002-1030-752X" />
<meta name="citation_author" content="D.M. Mandell" />
<meta name="citation_author_institution" content="cJoint Department of Medical Imaging and the Functional Neuroimaging Laboratory (A.P.C., J.P., K.S., D.M.M., D.J.M.)" />
<meta name="citation_author_orcid" content="http://orcid.org/0000-0001-8007-4947" />
<meta name="citation_author" content="D.J. Mikulis" />
<meta name="citation_author_institution" content="aFrom the Institute of Medical Science (O.S., D.J.M., J.A.F.)" />
<meta name="citation_author_institution" content="cJoint Department of Medical Imaging and the Functional Neuroimaging Laboratory (A.P.C., J.P., K.S., D.M.M., D.J.M.)" />
<meta name="citation_author_orcid" content="http://orcid.org/0000-0003-3956-0892" />
<meta name="citation_author" content="J. Duffin" />
<meta name="citation_author_institution" content="bDepartment of Physiology (K.S., J.D., J.A.F.), University of Toronto, Toronto, Canada" />
<meta name="citation_author_institution" content="dDepartment of Anaesthesia and Pain Management (J.D., J.A.F.), University Health Network, Toronto, Canada." />
<meta name="citation_author_orcid" content="http://orcid.org/0000-0003-2270-7392" />
<meta name="citation_author" content="J.A. Fisher" />
<meta name="citation_author_institution" content="aFrom the Institute of Medical Science (O.S., D.J.M., J.A.F.)" />
<meta name="citation_author_institution" content="bDepartment of Physiology (K.S., J.D., J.A.F.), University of Toronto, Toronto, Canada" />
<meta name="citation_author_institution" content="dDepartment of Anaesthesia and Pain Management (J.D., J.A.F.), University Health Network, Toronto, Canada." />
<meta name="citation_author_orcid" content="http://orcid.org/0000-0001-8911-3543" />
<meta name="citation_reference" content="citation_journal_title=Brain;citation_journal_abbrev=Brain;citation_author=H. Markus;citation_author=M. Cullinane;citation_title=Severely impaired cerebrovascular reactivity predicts stroke and TIA risk in patients with carotid artery stenosis and occlusion;citation_pages=457-467;citation_volume=124;citation_year=2001;citation_issue=3;citation_pmid=11222446;citation_doi=10.1093/brain/124.3.457" />
<meta name="citation_reference" content="citation_journal_title=Stroke;citation_journal_abbrev=Stroke;citation_author=K. Ogasawara;citation_author=A. Ogawa;citation_author=T. Yoshimoto;citation_title=Cerebrovascular Reactivity to Acetazolamide and Outcome in Patients With Symptomatic Internal Carotid or Middle Cerebral Artery Occlusion: A Xenon-133 Single-Photon Emission Computed Tomography Study;citation_pages=1857-1862;citation_volume=33;citation_year=2002;citation_issue=7;citation_pmid=12105366;citation_doi=10.1161/01.STR.0000019511.81583.A8" />
<meta name="citation_reference" content="citation_journal_title=Surgical neurology;citation_journal_abbrev=Surg Neurol;citation_author=M. Sasoh;citation_author=K. Ogasawara;citation_author=K. Kuroda;citation_title=Effects of EC-IC bypass surgery on cognitive impairment in patients with hemodynamic cerebral ischemia.;citation_pages=455-460;citation_volume=59;citation_year=2003;citation_issue=6;citation_pmid=12826338;citation_doi=10.1016/S0090-3019(03)00152-6" />
<meta name="citation_reference" content="citation_journal_title=Journal of Alzheimer's disease :  JAD;citation_journal_abbrev=J Alzheimers Dis;citation_author=M. Silvestrini;citation_author=G. Viticchi;citation_author=L. Falsetti;citation_title=The role of carotid atherosclerosis in Alzheimer's disease progression.;citation_pages=719-726;citation_volume=25;citation_year=2011;citation_issue=4;citation_pmid=21508532;citation_doi=10.3233/JAD-2011-101968" />
<meta name="citation_reference" content="citation_journal_abbrev=Nat Clin Pract Neurol;citation_author=JS. Han;citation_author=DM. Mandell;citation_author=J. Poublanc;citation_title=BOLD-MRI cerebrovascular reactivity findings in cocaine-induced cerebral vasculitis.;citation_pages=628-632;citation_volume=4;citation_year=2008;citation_issue=11;citation_pmid=18839005;citation_doi=10.1038/ncpneuro0918" />
<meta name="citation_reference" content="citation_journal_title=Journal of Neurology, Neurosurgery &amp; Psychiatry;citation_journal_abbrev=J. Neurol. Neurosurg. Psychiatry;citation_author=J. Fierstra;citation_author=J. Poublanc;citation_author=JS. Han;citation_title=Steal physiology is spatially associated with cortical thinning;citation_pages=290-293;citation_volume=81;citation_year=2010;citation_issue=3;citation_pmid=20185465;citation_doi=10.1136/jnnp.2009.188078" />
<meta name="citation_reference" content="citation_journal_title=AJNR Am J Neuroradiol;citation_author=DM. Mandell;citation_author=JS. Han;citation_author=J. Poublanc;citation_title=Quantitative measurement of cerebrovascular reactivity by blood oxygen level-dependent MR imaging in patients with intracranial stenosis: preoperative cerebrovascular reactivity predicts the effect of extracranial-intracranial bypass surgery;citation_volume=32;citation_year=2011;citation_pmid=21436343;citation_doi=10.3174/ajnr.A2365" />
<meta name="citation_reference" content="citation_journal_title=Neuroimage;citation_author=O. Sobczyk;citation_author=A. Battisti-Charbonney;citation_author=J. Fierstra;citation_title=A conceptual model for CO2-induced redistribution of cerebral blood flow with experimental confirmation using BOLD MRI;citation_pages=56-68;citation_volume=92;citation_year=2014;citation_pmid=24508647;citation_doi=10.1016/j.neuroimage.2014.01.051" />
<meta name="citation_reference" content="citation_journal_title=Neuroimage;citation_author=J. Duffin;citation_author=O. Sobczyk;citation_author=AP. Crawley;citation_title=The dynamics of cerebrovascular reactivity shown with transfer function analysis;citation_pages=207-16;citation_volume=114;citation_year=2015;citation_pmid=25891374;citation_doi=10.1016/j.neuroimage.2015.04.029" />
<meta name="citation_reference" content="citation_journal_title=Journal of Cerebral Blood Flow and Metabolism;citation_journal_abbrev=J Cereb Blood Flow Metab;citation_author=J. Poublanc;citation_author=AP. Crawley;citation_author=O. Sobczyk;citation_title=Measuring Cerebrovascular Reactivity: The Dynamic Response to a Step Hypercapnic Stimulus;citation_pages=1746-1756;citation_volume=35;citation_year=2015;citation_issue=11;citation_pmid=26126862;citation_doi=10.1038/jcbfm.2015.114" />
<meta name="citation_reference" content="citation_journal_title=European Respiratory Journal;citation_journal_abbrev=Eur Respir J;citation_author=LZ. Sommer;citation_author=S. Iscoe;citation_author=A. Robicsek;citation_title=A simple breathing circuit minimizing changes in alveolar ventilation during hyperpnoea;citation_pages=698-701;citation_volume=12;citation_year=1998;citation_issue=3;citation_pmid=9762802;citation_doi=10.1183/09031936.98.12030698" />
<meta name="citation_reference" content="citation_journal_title=J Physiol;citation_author=M. Slessarev;citation_author=J. Han;citation_author=A. Mardimae;citation_title=Prospective targeting and control of end-tidal CO2 and O2 concentrations;citation_volume=581;citation_year=2007;citation_pmid=17446225;citation_doi=10.1113/jphysiol.2007.129395" />
<meta name="citation_reference" content="citation_journal_title=Computers and biomedical research, an international journal;citation_journal_abbrev=Comput Biomed Res;citation_author=RW. Cox;citation_title=AFNI: software for analysis and visualization of functional magnetic resonance neuroimages.;citation_pages=162-173;citation_volume=29;citation_year=1996;citation_issue=3;citation_pmid=8812068;citation_doi=10.1006/cbmr.1996.0014" />
<meta name="citation_reference" content="citation_journal_abbrev=NeuroImage;citation_author=ZS. Saad;citation_author=DR. Glen;citation_author=G. Chen;citation_title=A new method for improving functional-to-structural MRI alignment using local Pearson correlation.;citation_pages=839-848;citation_volume=44;citation_year=2009;citation_issue=3;citation_pmid=18976717;citation_doi=10.1016/j.neuroimage.2008.09.037" />
<meta name="citation_reference" content="citation_journal_title=NeuroImage;citation_journal_abbrev=Neuroimage;citation_author=J. Ashburner;citation_author=K. Friston;citation_title=Multimodal image coregistration and partitioning--a unified framework.;citation_pages=209-217;citation_volume=6;citation_year=1997;citation_issue=3;citation_pmid=9344825;citation_doi=10.1006/nimg.1997.0290" />
<meta name="citation_reference" content="citation_journal_title=Human brain mapping;citation_journal_abbrev=Hum Brain Mapp;citation_author=J. Ashburner;citation_author=KJ. Friston;citation_title=Nonlinear spatial normalization using basis functions.;citation_pages=254-266;citation_volume=7;citation_year=1999;citation_issue=4;citation_pmid=10408769;citation_doi=10.1002/(SICI)1097-0193(1999)7:4&lt;254::AID-HBM4&gt;3.0.CO;2-G" />
<meta name="citation_reference" content="citation_journal_title=Journal of magnetic resonance imaging :  JMRI;citation_journal_abbrev=J Magn Reson Imaging;citation_author=A. Kassner;citation_author=JD. Winter;citation_author=J. Poublanc;citation_title=Blood-oxygen level dependent MRI measures of cerebrovascular reactivity using a controlled respiratory challenge: reproducibility and gender differences.;citation_pages=298-304;citation_volume=31;citation_year=2010;citation_issue=2;citation_pmid=20099341;citation_doi=10.1002/jmri.22044" />
<meta name="citation_reference" content="citation_journal_title=Magnetic resonance in medicine :  official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine;citation_journal_abbrev=Magn Reson Med;citation_author=CI. Mark;citation_author=M. Slessarev;citation_author=S. Ito;citation_title=Precise control of end-tidal carbon dioxide and oxygen improves BOLD and ASL cerebrovascular reactivity measures.;citation_pages=749-756;citation_volume=64;citation_year=2010;citation_issue=3;citation_pmid=20648687;citation_doi=10.1002/mrm.22405" />
<meta name="citation_reference" content="citation_journal_title=J Physiol;citation_author=J. Fierstra;citation_author=O. Sobczyk;citation_author=A. Battisti-Charbonney;citation_title=Measuring cerebrovascular reactivity: what stimulus to use?;citation_volume=591;citation_year=2013;citation_pmid=24081155;citation_doi=10.1113/jphysiol.2013.259150" />
<meta name="citation_reference" content="citation_journal_title=Journal of Cerebral Blood Flow and Metabolism;citation_journal_abbrev=J Cereb Blood Flow Metab;citation_author=FB. Tancredi;citation_author=RD. Hoge;citation_title=Comparison of Cerebral Vascular Reactivity Measures Obtained Using Breath-Holding and CO2 Inhalation;citation_pages=1066-1074;citation_volume=33;citation_year=2013;citation_issue=7;citation_pmid=23571282;citation_doi=10.1038/jcbfm.2013.48" />
<meta name="citation_reference" content="citation_journal_title=Journal of Clinical Investigation;citation_journal_abbrev=JCI;citation_author=SS. Kety;citation_author=CF. Schmidt;citation_title=THE EFFECTS OF ALTERED ARTERIAL TENSIONS OF CARBON DIOXIDE AND OXYGEN ON CEREBRAL BLOOD FLOW AND CEREBRAL OXYGEN CONSUMPTION OF NORMAL YOUNG MEN.;citation_pages=484-492;citation_volume=27;citation_year=1948;citation_issue=4;citation_pmid=16695569;citation_doi=10.1172/JCI101995" />
<meta name="citation_reference" content="citation_journal_title=Stroke;citation_journal_abbrev=Stroke;citation_author=HS. Markus;citation_author=MJ. Harrison;citation_title=Estimation of cerebrovascular reactivity using transcranial Doppler, including the use of breath-holding as the vasodilatory stimulus;citation_pages=668-673;citation_volume=23;citation_year=1992;citation_issue=5;citation_pmid=1579964;citation_doi=10.1161/01.STR.23.5.668" />
<meta name="citation_reference" content="citation_journal_title=Neuroradiology;citation_journal_abbrev=Neuroradiology;citation_author=FH. van der Zande;citation_author=PA. Hofman;citation_author=WH. Backes;citation_title=Mapping hypercapnia-induced cerebrovascular reactivity using BOLD MRI.;citation_pages=114-120;citation_volume=47;citation_year=2005;citation_issue=2;citation_pmid=15616848;citation_doi=10.1007/s00234-004-1274-3" />
<meta name="citation_reference" content="citation_journal_title=Acta neurologica Scandinavica;citation_journal_abbrev=Acta Neurol Scand;citation_author=M. Silvestrini;citation_author=F. Vernieri;citation_author=E. Troisi;citation_title=Cerebrovascular reactivity in carotid artery occlusion: possible implications for surgical management of selected groups of patients.;citation_pages=187-191;citation_volume=99;citation_year=1999;citation_issue=3;citation_pmid=10100963;citation_doi=10.1111/j.1600-0404.1999.tb07342.x" />
<meta name="citation_reference" content="citation_journal_title=International journal of radiation biology;citation_journal_abbrev=Int J Radiat Biol;citation_author=E. Prisman;citation_author=M. Slessarev;citation_author=T. Azami;citation_title=Modified oxygen mask to induce target levels of hyperoxia and hypercarbia during radiotherapy: a more effective alternative to carbogen.;citation_pages=457-462;citation_volume=83;citation_year=2007;citation_issue=7;citation_pmid=17538795;citation_doi=10.1080/09553000701370894" />
<meta name="citation_reference" content="citation_journal_title=J Physiol;citation_author=S. Ito;citation_author=A. Mardimae;citation_author=J. Han;citation_title=Non-invasive prospective targeting of arterial P(CO2) in subjects at rest;citation_volume=586;citation_year=2008;citation_pmid=18565992;citation_doi=10.1113/jphysiol.2008.154716" />
<meta name="citation_reference" content="citation_journal_title=Journal of Cerebral Blood Flow and Metabolism;citation_journal_abbrev=J Cereb Blood Flow Metab;citation_author=O. Sobczyk;citation_author=A. Battisti-Charbonney;citation_author=J. Poublanc;citation_title=Assessing Cerebrovascular Reactivity Abnormality by Comparison to a Reference Atlas;citation_pages=213-220;citation_volume=35;citation_year=2015;citation_issue=2;citation_pmid=25388679;citation_doi=10.1038/jcbfm.2014.184" />
<meta name="citation_reference" content="citation_journal_title=Neuroradiology;citation_author=M. Grade;citation_author=JA. Hernandez Tamames;citation_author=FB. Pizzini;citation_title=A neuroradiologist's guide to arterial spin labeling MRI in clinical practice;citation_pages=1181-202;citation_volume=57;citation_year=2015;citation_pmid=26351201;citation_doi=10.1007/s00234-015-1571-z" />
<meta name="citation_reference" content="citation_journal_title=Stroke;citation_author=DM. Mandell;citation_author=JS. Han;citation_author=J. Poublanc;citation_title=Mapping cerebrovascular reactivity using blood oxygen level-dependent MRI in patients with arterial steno-occlusive disease: comparison with arterial spin labeling MRI;citation_volume=39;citation_year=2008;citation_pmid=18451352;citation_doi=10.1161/STROKEAHA.107.506709" />
<meta name="citation_reference" content="citation_journal_title=J Magn Reson Imaging;citation_author=FB. Tancredi;citation_author=I. Lajoie;citation_author=RD. Hoge;citation_title=Test-retest reliability of cerebral blood flow and blood oxygenation level-dependent responses to hypercapnia and hyperoxia using dual-echo pseudo-continuous arterial spin labeling and step changes in the fractional composition of inspired gases;citation_pages=1144-57;citation_volume=42;citation_year=2015;citation_pmid=25752936;citation_doi=10.1002/jmri.24878" />
<meta name="citation_reference" content="citation_journal_title=PNAS;citation_journal_abbrev=Proc. Natl. Acad. Sci. USA;citation_author=TL. Davis;citation_author=KK. Kwong;citation_author=RM. Weisskoff;citation_title=Calibrated functional MRI: Mapping the dynamics of oxidative metabolism;citation_pages=1834-1839;citation_volume=95;citation_year=1998;citation_issue=4;citation_pmid=9465103;citation_doi=10.1073/pnas.95.4.1834" />
<meta name="citation_reference" content="citation_journal_title=Magn ResonMed;citation_author=RD. Hoge;citation_author=J. Atkinson;citation_author=B. Gill;citation_title=Investigation of BOLD signal dependence on cerebral blood flow and oxygen consumption: the deoxyhemoglobin dilution model;citation_pages=849-63;citation_volume=42;citation_year=1999;citation_pmid=10542343;citation_doi=10.1002/(SICI)1522-2594(199911)42:5&lt;849::AID-MRM4&gt;3.0.CO;2-Z" />
<meta name="citation_reference" content="citation_journal_title=Stroke;citation_journal_abbrev=Stroke;citation_author=A. Kastrup;citation_author=C. Thomas;citation_author=C. Hartmann;citation_title=Sex Dependency of Cerebrovascular CO2 Reactivity in Normal Subjects;citation_pages=2353-2356;citation_volume=28;citation_year=1997;citation_issue=12;citation_pmid=9412613;citation_doi=10.1161/01.STR.28.12.2353" />
<meta name="citation_reference" content="citation_journal_title=Front Physiol;citation_author=D. Flück;citation_author=AE. Beaudin;citation_author=CD. Steinback;citation_title=Effects of aging on the association between cerebrovascular responses to visual stimulation, hypercapnia and arterial stiffness;citation_pages=49;citation_volume=5;citation_year=2014;citation_pmid=24600398;citation_doi=10.3389/fphys.2014.00049" />
<meta name="citation_reference" content="citation_journal_title=J Magn Reson Imaging;citation_author=CI. Mark;citation_author=EL. Mazerolle;citation_author=JJ. Chen;citation_title=Metabolic and vascular origins of the BOLD effect: implications for imaging pathology and resting-state brain function;citation_pages=231-46;citation_volume=42;citation_year=2015;citation_pmid=25727523;citation_doi=10.1002/jmri.24786" />
<meta name="citation_reference" content="citation_journal_title=Journal of the neurological sciences;citation_journal_abbrev=J Neurol Sci;citation_author=N. Schwertfeger;citation_author=P. Neu;citation_author=P. Schlattmann;citation_title=Cerebrovascular reactivity over time course in healthy subjects.;citation_pages=135-139;citation_volume=249;citation_year=2006;citation_issue=2;citation_pmid=16859710;citation_doi=10.1016/j.jns.2006.06.009" />
<meta name="citation_reference" content="citation_journal_title=Brain Behav;citation_author=RE. Regan;citation_author=JA. Fisher;citation_author=J. Duffin;citation_title=Factors affecting the determination of cerebrovascular reactivity;citation_pages=775-88;citation_volume=4;citation_year=2014;citation_pmid=25328852;citation_doi=10.1002/brb3.275" />
<meta name="twitter:title" content="Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:image" content="http://ajnr-stage2.stage.highwire.org/sites/default/files/highwire/ajnr/37/5.cover-source.jpg" />
<meta name="twitter:description" content="BACKGROUND AND PURPOSE: Changes in cerebrovascular reactivity can be used to assess disease progression and response to therapy but require discrimination of pathology from normal test-to-test variability. Such variability is due to variations in methodology, technology, and physiology with time. With uniform test conditions, our aim was to determine the test-to-test variability of cerebrovascular reactivity in healthy subjects and in patients with known cerebrovascular disease.

MATERIALS AND METHODS: Cerebrovascular reactivity was the ratio of the blood oxygen level–dependent MR imaging response divided by the change in carbon dioxide stimulus. Two standardized cerebrovascular reactivity tests were conducted at 3T in 15 healthy men (36.7 ± 16.1 years of age) within a 4-month period and were coregistered into standard space to yield voxelwise mean cerebrovascular reactivity interval difference measures, composing a reference interval difference atlas. Cerebrovascular reactivity interval difference maps were prepared for 11 male patients. For each patient, the test-retest difference of each voxel was scored statistically as z-values of the corresponding voxel mean difference in the reference atlas and then color-coded and superimposed on the anatomic images to create cerebrovascular reactivity interval difference z-maps.

RESULTS: There were no significant test-to-test differences in cerebrovascular reactivity in either gray or white matter (mean gray matter, P = .431; mean white matter, P = .857; paired t test) in the healthy cohort. The patient cerebrovascular reactivity interval difference z-maps indicated regions where cerebrovascular reactivity increased or decreased and the probability that the changes were significant.

CONCLUSIONS: Accounting for normal test-to-test differences in cerebrovascular reactivity enables the assessment of significant changes in disease status (stability, progression, or regression) in patients with time.

BOLD
:   blood oxygen level–dependent
CO2
:   carbon dioxide
CVR
:   cerebrovascular reactivity
EC-IC
:   extracranial to intracranial
ID
:   interval difference
PaCO2
:   arterial partial pressure of carbon dioxide
PetCO2
:   end-tidal partial pressure of carbon dioxide" />
<meta name="og-title" property="og:title" content="Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide" />
<meta name="og-url" property="og:url" content="http://ajnr-stage2.stage.highwire.org/content/37/5/818" />
<meta name="og-site-name" property="og:site_name" content="American Journal of Neuroradiology" />
<meta name="og-description" property="og:description" content="BACKGROUND AND PURPOSE: Changes in cerebrovascular reactivity can be used to assess disease progression and response to therapy but require discrimination of pathology from normal test-to-test variability. Such variability is due to variations in methodology, technology, and physiology with time. With uniform test conditions, our aim was to determine the test-to-test variability of cerebrovascular reactivity in healthy subjects and in patients with known cerebrovascular disease.

MATERIALS AND METHODS: Cerebrovascular reactivity was the ratio of the blood oxygen level–dependent MR imaging response divided by the change in carbon dioxide stimulus. Two standardized cerebrovascular reactivity tests were conducted at 3T in 15 healthy men (36.7 ± 16.1 years of age) within a 4-month period and were coregistered into standard space to yield voxelwise mean cerebrovascular reactivity interval difference measures, composing a reference interval difference atlas. Cerebrovascular reactivity interval difference maps were prepared for 11 male patients. For each patient, the test-retest difference of each voxel was scored statistically as z-values of the corresponding voxel mean difference in the reference atlas and then color-coded and superimposed on the anatomic images to create cerebrovascular reactivity interval difference z-maps.

RESULTS: There were no significant test-to-test differences in cerebrovascular reactivity in either gray or white matter (mean gray matter, P = .431; mean white matter, P = .857; paired t test) in the healthy cohort. The patient cerebrovascular reactivity interval difference z-maps indicated regions where cerebrovascular reactivity increased or decreased and the probability that the changes were significant.

CONCLUSIONS: Accounting for normal test-to-test differences in cerebrovascular reactivity enables the assessment of significant changes in disease status (stability, progression, or regression) in patients with time.

BOLD
:   blood oxygen level–dependent
CO2
:   carbon dioxide
CVR
:   cerebrovascular reactivity
EC-IC
:   extracranial to intracranial
ID
:   interval difference
PaCO2
:   arterial partial pressure of carbon dioxide
PetCO2
:   end-tidal partial pressure of carbon dioxide" />
<meta name="og-type" property="og:type" content="article" />
<meta name="og-image" property="og:image" content="http://ajnr-stage2.stage.highwire.org/sites/default/files/highwire/ajnr/37/5.cover-source.jpg" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link rel="alternate" type="application/vnd.ms-powerpoint" title="Powerpoint" href="/content/37/5/818.ppt" />
<link rel="alternate" type="text/plain" title="Full Text (Plain)" href="/content/37/5/818.full.txt" />
<link rel="alternate" type="application/pdf" title="Full Text (PDF)" href="/content/37/5/818.full.pdf" />
<link rel="canonical" href="http://ajnr-stage2.stage.highwire.org/content/37/5/818" />
<script>window.dataLayer = window.dataLayer || [];window.dataLayer.push({"page":{"hwTitle":"Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide","hwUrl":"http://ajnr-stage2.stage.highwire.org/content/37/5/818","hwPath":"/content/37/5/818/tab-references","hwType":"journal page"},"user":{"hwMemberID":"","hwLoggedIntoInstitutionID":"","hwLoggedIntoInstitution":"","hwAccessUsageTerms":"guest","hwRegisteredUser":"no","hwHasFullTextAccess":"yes","hwEntitled":"no"},"content":{"hwIssueDate":"2016-05-01","hwIssueDateTime":"2016-05-01 00:00:00","hwPublicationDate":"2016-05-13","hwPublicationDateTime":"2016-05-13 08:00:52","hwNlmArticleType":"research-article","hwDOI":"10.3174/ajnr.A4679","hwAuthors":"O. Sobczyk,A.P. Crawley,J. Poublanc,K. Sam,D.M. Mandell,D.J. Mikulis,J. Duffin,J.A. Fisher","hwContributors":"","hwIsEarlyRelease":"no","hwEissn":"1936-959X","hwPissn":"0195-6108","hwVolume":"37","hwIssue":"5","hwArticleType":"ADULT BRAIN","hwTabView":"main_tab","hwViewType":"full","hwAccessType":"Free","hwOpenAccess":"no","hwFreeAccess":"yes","hwTaxonomy":"","hwCorpusCode":"ajnr","hwType":"article","hwSubtitle":null,"hwOverline":null,"hwPisaId":"ajnr;37/5/818","hwFirstPage":"818","hwLastPage":"824","hwIsLatestVersion":"yes","hwIsCurrentIssue":"no","hwIsOpenIssue":"no","hwHasFullText":"yes","hwHasPDF":"yes","hwParentTitle":"American Journal of Neuroradiology: 37 (5)","hwElectronicPubDate":"2016-05-13","hwElectronicPubDateTime":"2016-05-13 08:00:52"}});
//--><!]]></script>
    <title>Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide | American Journal of Neuroradiology</title>  
    <link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__BJ6Ou6QsBRtnFTmxaakamOIS8n4QswDP2XnnZ1sxtaM__NBuvkP6eInGIkb1aJvUHx5PX79XApuxBDkk_77W5tYk__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />
<link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__azeXjFYQUa4gTbdEg4sgM2osudOlAYwVv6vNmRXI3ac__zr83wx5lNxUVx-jSIFm8RDKOeMAB7RbaBxriFHS3dt4__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />
<link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__Ep75tNOnm8H2Mejav16FnGCfM1sLwyporbQrCIgwg3g__vXGjszfa0bvxzymQ8Cfns-o2huFvm80jp3igN8XcYeI__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />
<link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__TKi6DXKzgLPdEthh1Tnc63zY1QF4rLZHoM06Xy7VN6g__zaEHphFiBcrl8WVy_4n080y02dQ7HKxd_aqZbYgQ5Z0__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />
<link type="text/css" rel="stylesheet" href="/sites/all/modules/highwire/highwire/highwire.style.highwire.css?sycxuq" media="all" />
<link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__GCZYdoBJPkDPT11tDlq7l1SGMSI3i0pLRfwcRaDqjiw__1qMCzNFZKnaaDU1HkjUXfw159S5M5q2EDcw2MTzz3I4__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />
<link type="text/css" rel="stylesheet" href="//cdn.jsdelivr.net/qtip2/2.2.1/jquery.qtip.min.css" media="all" />
<link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__n6immcbFGHUyREsHs1QqY_W6CwI_fBjAiqk1kSw_TLk__OCnLRdd3X-ussp_qruJLv8g1F0mrp4lAVEWRv6BkGRo__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />
<style type="text/css" media="all">
/* <![CDATA[ */
#sliding-popup.sliding-popup-bottom,#sliding-popup.sliding-popup-bottom .eu-cookie-withdraw-banner,.eu-cookie-withdraw-tab{background:#000000;}#sliding-popup.sliding-popup-bottom.eu-cookie-withdraw-wrapper{background:transparent}#sliding-popup .popup-content #popup-text h1,#sliding-popup .popup-content #popup-text h2,#sliding-popup .popup-content #popup-text h3,#sliding-popup .popup-content #popup-text p,.eu-cookie-compliance-secondary-button,.eu-cookie-withdraw-tab{color:#ffffff !important;}.eu-cookie-withdraw-tab{border-color:#ffffff;}.eu-cookie-compliance-more-button{color:#ffffff !important;}

/* ]]> */
</style>

<!--[if lte IE 7]>
<link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__ElJr3PIJEvw3qLXc1cnYiLj2G4KgDPSXFOfm6Phf8hw__JdWGm15cDWjsK6KrFlQVXQix9YgNeYysf22XZHj-Y-c__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />
<![endif]-->
<link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__Wnlyen9qEpwh_Qaf9okEu4QdVGM0BDothxeqA6Nbvo8__EJmw6SZD9bYoS8jocCpPYS3JFRURpdzmuvJoAUNiI-g__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />
<link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__nv7Hafs9UucfV8bmT4epWF4zWAFU2G9JLHVgOOHDqbA__k9QUw6MohZGXV0YlzqvUpPTbyzhbizsKOi4x3aA7Tx0__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />

<!--[if (lt IE 9)&(!IEMobile)]>
<link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__XH6bpcI0f2dImc-p674DLCZtWBGb-QwxJK1YexVGtno__vUceGprdo5nIhV6DH93X7fI3r8RcTJbChbas9TQXeW4__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />
<![endif]-->

<!--[if gte IE 9]><!-->
<link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__2WBMox6sOrN42ss5lCnH7WWVRdFdJCxtTKnQJYRwTE4__yqNvNYLvMpjy3ffuJrjjm9uW2i-Me1c23KLYuWHaqio__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />
<!--<![endif]-->
<link type="text/css" rel="stylesheet" href="/sites/default/files/advagg_css/css__wxg7u6KrkAKrph8zjmzjNAiqxtVP2vhMWX2NZ6DPPZE__ECvRNuvDf2Tm_Pc-j1mEkt48QjmIz2s2CyWDspWAhhI__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.css" media="all" />
    <script type="text/javascript">
<!--//--><![CDATA[//><!--
/*!
 * yepnope1.5.4
 * (c) WTFPL, GPLv2
 */
(function(a,b,c){function d(a){return"[object Function]"==o.call(a)}function e(a){return"string"==typeof a}function f(){}function g(a){return!a||"loaded"==a||"complete"==a||"uninitialized"==a}function h(){var a=p.shift();q=1,a?a.t?m(function(){("c"==a.t?B.injectCss:B.injectJs)(a.s,0,a.a,a.x,a.e,1)},0):(a(),h()):q=0}function i(a,c,d,e,f,i,j){function k(b){if(!o&&g(l.readyState)&&(u.r=o=1,!q&&h(),l.onload=l.onreadystatechange=null,b)){"img"!=a&&m(function(){t.removeChild(l)},50);for(var d in y[c])y[c].hasOwnProperty(d)&&y[c][d].onload()}}var j=j||B.errorTimeout,l=b.createElement(a),o=0,r=0,u={t:d,s:c,e:f,a:i,x:j};1===y[c]&&(r=1,y[c]=[]),"object"==a?l.data=c:(l.src=c,l.type=a),l.width=l.height="0",l.onerror=l.onload=l.onreadystatechange=function(){k.call(this,r)},p.splice(e,0,u),"img"!=a&&(r||2===y[c]?(t.insertBefore(l,s?null:n),m(k,j)):y[c].push(l))}function j(a,b,c,d,f){return q=0,b=b||"j",e(a)?i("c"==b?v:u,a,b,this.i++,c,d,f):(p.splice(this.i++,0,a),1==p.length&&h()),this}function k(){var a=B;return a.loader={load:j,i:0},a}var l=b.documentElement,m=a.setTimeout,n=b.getElementsByTagName("script")[0],o={}.toString,p=[],q=0,r="MozAppearance"in l.style,s=r&&!!b.createRange().compareNode,t=s?l:n.parentNode,l=a.opera&&"[object Opera]"==o.call(a.opera),l=!!b.attachEvent&&!l,u=r?"object":l?"script":"img",v=l?"script":u,w=Array.isArray||function(a){return"[object Array]"==o.call(a)},x=[],y={},z={timeout:function(a,b){return b.length&&(a.timeout=b[0]),a}},A,B;B=function(a){function b(a){var a=a.split("!"),b=x.length,c=a.pop(),d=a.length,c={url:c,origUrl:c,prefixes:a},e,f,g;for(f=0;f<d;f++)g=a[f].split("="),(e=z[g.shift()])&&(c=e(c,g));for(f=0;f<b;f++)c=x[f](c);return c}function g(a,e,f,g,h){var i=b(a),j=i.autoCallback;i.url.split(".").pop().split("?").shift(),i.bypass||(e&&(e=d(e)?e:e[a]||e[g]||e[a.split("/").pop().split("?")[0]]),i.instead?i.instead(a,e,f,g,h):(y[i.url]?i.noexec=!0:y[i.url]=1,f.load(i.url,i.forceCSS||!i.forceJS&&"css"==i.url.split(".").pop().split("?").shift()?"c":c,i.noexec,i.attrs,i.timeout),(d(e)||d(j))&&f.load(function(){k(),e&&e(i.origUrl,h,g),j&&j(i.origUrl,h,g),y[i.url]=2})))}function h(a,b){function c(a,c){if(a){if(e(a))c||(j=function(){var a=[].slice.call(arguments);k.apply(this,a),l()}),g(a,j,b,0,h);else if(Object(a)===a)for(n in m=function(){var b=0,c;for(c in a)a.hasOwnProperty(c)&&b++;return b}(),a)a.hasOwnProperty(n)&&(!c&&!--m&&(d(j)?j=function(){var a=[].slice.call(arguments);k.apply(this,a),l()}:j[n]=function(a){return function(){var b=[].slice.call(arguments);a&&a.apply(this,b),l()}}(k[n])),g(a[n],j,b,n,h))}else!c&&l()}var h=!!a.test,i=a.load||a.both,j=a.callback||f,k=j,l=a.complete||f,m,n;c(h?a.yep:a.nope,!!i),i&&c(i)}var i,j,l=this.yepnope.loader;if(e(a))g(a,0,l,0);else if(w(a))for(i=0;i<a.length;i++)j=a[i],e(j)?g(j,0,l,0):w(j)?B(j):Object(j)===j&&h(j,l);else Object(a)===a&&h(a,l)},B.addPrefix=function(a,b){z[a]=b},B.addFilter=function(a){x.push(a)},B.errorTimeout=1e4,null==b.readyState&&b.addEventListener&&(b.readyState="loading",b.addEventListener("DOMContentLoaded",A=function(){b.removeEventListener("DOMContentLoaded",A,0),b.readyState="complete"},0)),a.yepnope=k(),a.yepnope.executeStack=h,a.yepnope.injectJs=function(a,c,d,e,i,j){var k=b.createElement("script"),l,o,e=e||B.errorTimeout;k.src=a;for(o in d)k.setAttribute(o,d[o]);c=j?h:c||f,k.onreadystatechange=k.onload=function(){!l&&g(k.readyState)&&(l=1,c(),k.onload=k.onreadystatechange=null)},m(function(){l||(l=1,c(1))},e),i?k.onload():n.parentNode.insertBefore(k,n)},a.yepnope.injectCss=function(a,c,d,e,g,i){var e=b.createElement("link"),j,c=i?h:c||f;e.href=a,e.rel="stylesheet",e.type="text/css";for(j in d)e.setAttribute(j,d[j]);g||(n.parentNode.insertBefore(e,n),m(c,0))}})(this,document);

//--><!]]>
</script>
<script type="text/javascript" src="/sites/all/libraries/modernizr/modernizr.min.js?sycxuq"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
yepnope({
  test: Modernizr.matchmedia,
  nope: '/sites/all/libraries/media-match/media.match.min.js'
});
//--><!]]>
</script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__wH8myWXKi4A-QKdUKDXzJAnGs-FRS1A2ZzTTNzjRAdI__4MCtOZK_Ov0QKyRlXNLGQ2LRlYRGWj9ArT-NpFox3QA__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
var googletag = googletag || {};
googletag.cmd = googletag.cmd || [];
googletag.slots = googletag.slots || {};
//--><!]]>
</script>
<script type="text/javascript" src="//securepubads.g.doubleclick.net/tag/js/gpt.js"></script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__9ici6QMeDS-cROq8R0RhuICsMGMP2wcJZNQQFsqQi44__kScSwG4RXGl1LXnj4qqt0ZxtNX4Gh2TK5W-o8Uup4SA__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__fwhbnUWIxW-jFl55E2mBYVtZTjGhJ1JWyZYAJ2cEd3A__jCrCuWCJIPYPe1FzZoUvsJWEjkNMmRIQHYek1h7idBE__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
googletag.slots["rhs"] = googletag.defineSlot("/446583111/RHS_300x250", [300, 250], "dfp-ad-rhs")
  .addService(googletag.pubads());
//--><!]]>
</script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__UR8BHznwml64Vq0ijSGFwlm-xe9ttj1aripHInFCOLw__irCalsu-H_fRTOPqjyCv1O8Ax7fqY6DDf-uMOV1dvGY__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
var mapping = googletag.sizeMapping()
  .addSize([768, 0], [728, 90])
  .addSize([0, 0], [300, 50])
  .build();
googletag.slots["bottom_leaderboard"] = googletag.defineSlot("/446583111/Bottom_Banner_728x90", [[728, 90], [300, 50]], "dfp-ad-bottom_leaderboard")
  .addService(googletag.pubads())
  .defineSizeMapping(mapping);
//--><!]]>
</script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__bQc6kyz_Gw2afC1F6wguCBh8Z8nev-hxX6F2Tw4bq6k__CO2faEsYCquY82rVj6as9HScSnogGHeR-oh5fSQydG0__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
var mapping = googletag.sizeMapping()
  .addSize([768, 0], [728, 90])
  .addSize([0, 0], [300, 50])
  .build();
googletag.slots["top_leaderboard"] = googletag.defineSlot("/446583111/Top_Leaderboard_728x90", [[728, 90], [300, 50]], "dfp-ad-top_leaderboard")
  .addService(googletag.pubads())
  .defineSizeMapping(mapping);
//--><!]]>
</script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__wS6WUeF11NLeJgCqxc-dMvjhALAMQG1jlaeWdG8yVZc__CPiombDS21ooaYdmqHXdcMoJwB2FMn18JzO97LewQxc__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
document.createElement( "picture" );
//--><!]]>
</script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__UK1ygaa8bCfT-jsjqYRdRLDZ5N17950T7K5WPC9XtpI__NqLYT1T1SMBsKukLWIe82VgCZYYCMHZX_f609-a1rj8__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
googletag.cmd.push(function() {
  googletag.pubads().enableAsyncRendering();
  googletag.pubads().enableSingleRequest();
  googletag.pubads().collapseEmptyDivs();
  googletag.pubads().addEventListener("slotRenderEnded", function (event) {
    if (event.isEmpty) {
      var id = event.slot.getSlotElementId();
      var x = document.getElementById(id);
      if (x.parentElement.classList.contains("dfp-tag-wrapper")) {
        x.parentElement.style.display = "none";
      }
    }
  });
  googletag.pubads().setTargeting("page:hwTitle", "Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide");
  googletag.pubads().setTargeting("page:hwUrl", "http://ajnr-stage2.stage.highwire.org/content/37/5/818");
  googletag.pubads().setTargeting("page:hwPath", "/content/37/5/818/tab-references");
  googletag.pubads().setTargeting("page:hwType", "journal page");
  googletag.pubads().setTargeting("user:hwAccessUsageTerms", "guest");
  googletag.pubads().setTargeting("user:hwRegisteredUser", "no");
  googletag.pubads().setTargeting("user:hwHasFullTextAccess", "yes");
  googletag.pubads().setTargeting("user:hwEntitled", "no");
  googletag.pubads().setTargeting("content:hwIssueDate", "2016-05-01");
  googletag.pubads().setTargeting("content:hwIssueDateTime", "2016-05-01 00:00:00");
  googletag.pubads().setTargeting("content:hwPublicationDate", "2016-05-13");
  googletag.pubads().setTargeting("content:hwPublicationDateTime", "2016-05-13 08:00:52");
  googletag.pubads().setTargeting("content:hwNlmArticleType", "research-article");
  googletag.pubads().setTargeting("content:hwDOI", "10.3174/ajnr.A4679");
  googletag.pubads().setTargeting("content:hwAuthors", ["O. Sobczyk","A.P. Crawley","J. Poublanc","K. Sam","D.M. Mandell","D.J. Mikulis","J. Duffin","J.A. Fisher"]);
  googletag.pubads().setTargeting("content:hwIsEarlyRelease", "no");
  googletag.pubads().setTargeting("content:hwEissn", "1936-959X");
  googletag.pubads().setTargeting("content:hwPissn", "0195-6108");
  googletag.pubads().setTargeting("content:hwVolume", "37");
  googletag.pubads().setTargeting("content:hwIssue", "5");
  googletag.pubads().setTargeting("content:hwArticleType", "ADULT BRAIN");
  googletag.pubads().setTargeting("content:hwTabView", "main_tab");
  googletag.pubads().setTargeting("content:hwViewType", "full");
  googletag.pubads().setTargeting("content:hwAccessType", "Free");
  googletag.pubads().setTargeting("content:hwOpenAccess", "no");
  googletag.pubads().setTargeting("content:hwFreeAccess", "yes");
  googletag.pubads().setTargeting("content:hwCorpusCode", "ajnr");
  googletag.pubads().setTargeting("content:hwType", "article");
  googletag.pubads().setTargeting("content:hwPisaId", "ajnr;37/5/818");
  googletag.pubads().setTargeting("content:hwFirstPage", "818");
  googletag.pubads().setTargeting("content:hwLastPage", "824");
  googletag.pubads().setTargeting("content:hwIsLatestVersion", "yes");
  googletag.pubads().setTargeting("content:hwIsCurrentIssue", "no");
  googletag.pubads().setTargeting("content:hwIsOpenIssue", "no");
  googletag.pubads().setTargeting("content:hwHasFullText", "yes");
  googletag.pubads().setTargeting("content:hwHasPDF", "yes");
  googletag.pubads().setTargeting("content:hwParentTitle", "American Journal of Neuroradiology: 37 (5)");
  googletag.pubads().setTargeting("content:hwElectronicPubDate", "2016-05-13");
  googletag.pubads().setTargeting("content:hwElectronicPubDateTime", "2016-05-13 08:00:52");
});

googletag.enableServices();
//--><!]]>
</script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__3vwOA0BwlnyBkt9H4CLg6FgNyKAh--OmfOxFOIu_5S4__EXTgktcHbQ7BQfelY6CnrqgPRc4i4eD6XcZ4i3xs5RU__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript" async="async" src="https://scholar.google.com/scholar_js/casa.js"></script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__9KVl25y7_YSWsHd8MJxANuoBa2gQO2D6JActjFaWm7Y__xYFBh175l8jQKFw3m-HycL27WpXn5AhyqmE54lX1y5k__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript" src="https://www.google.com/recaptcha/api.js?hl=en&amp;render=explicit&amp;onload=drupalRecaptchaOnload"></script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__4ykqVVdSaGtVGauctG3E3Uojp_237f35KQ7wMtKX9S4__4JHByHSitU6UdWxmWARTSoZyB2PFgzkw__raxGdvbvk__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--

      $(document).ready(function() {
          $.getJSON("//www.deepdyve.com/rental-link?docId=10.3174/ajnr.A4679&journal=1936-959X&fieldName=journal_doi&affiliateId=asnr&format=jsonp&callback=?", function(data) {
            if (data.status === "ok") {
              // Update the href url so it goes straight to the article page
              $(".js-deepdyve-link a").attr("href", data.url);
              $(".js-deepdyve-link").show();
            } else if (data.status === "not_found") {
              $(".js-deepdyve-link").hide();
            }
          });
        });
//--><!]]>
</script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__msHj38UGaDSh75fm0y4NZQL34TdP45x2BK1FdKTv6ZM__C89OzFxPAWvHKPA2LSTrninkZhH68bcfaE1RL2F3atw__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript" src="//cdn.jsdelivr.net/qtip2/2.2.1/jquery.qtip.min.js"></script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__DB1qE9oPA7BmkZgUlfWOGlpBCMBBy9vo9Y3Q5EVKkjg__qxHOHuuCB_A7KuBHI2XD3Xrp0bLFZN25UhOoa5zY4OQ__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript" async="async" src="https://www.googletagmanager.com/gtag/js?id=G-4CRTLTY8KW"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
window.dataLayer = window.dataLayer || [];function gtag(){dataLayer.push(arguments)};gtag("js", new Date());gtag("set", "developer_id.dMDhkMT", true);gtag("config", "G-4CRTLTY8KW", {"groups":"default","anonymize_ip":true});
//--><!]]>
</script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__xwmR_XUqgIHdKocIkn2GiqYMVWJ0gY7OwpoARPRxEYM__CdSkXbn46iKUJfVct1nUx50N8MQ35eZOCMya9EuGbeU__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__156__G_TX0wWbp2x4EuISKOgbs4NaeHZ2KmXq85T6UI__w2izI_4UeJKq2XZJo79kNkQyxp_-2ptYjzA3YJcr-tg__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__az53Pz-SG0wejB-7UDzC-AbKqNFb4dAiZbq9Ymbj0sY__8FyXs8A34T1jX6OUXsgX27-4ASoy8QDncslXiOc2PK4__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
jQuery.extend(Drupal.settings, {"basePath":"\/","pathPrefix":"","ajaxPageState":{"theme":"jcore_1","theme_token":"8AcKmkTf6nhZG6WDD5Hg5z0blXadQ1Ri00a-CrGkCtY","js":{"sites\/all\/libraries\/modernizr\/modernizr.min.js":1,"sites\/all\/modules\/contrib\/jquery_update\/replace\/jquery\/1.8\/jquery.min.js":1,"misc\/jquery-extend-3.4.0.js":1,"misc\/jquery.once.js":1,"misc\/drupal.js":1,"sites\/all\/modules\/contrib\/jquery_update\/replace\/ui\/ui\/minified\/jquery.ui.core.min.js":1,"sites\/all\/modules\/contrib\/jquery_update\/replace\/ui\/ui\/minified\/jquery.ui.widget.min.js":1,"sites\/all\/modules\/contrib\/jquery_update\/replace\/ui\/ui\/minified\/jquery.ui.button.min.js":1,"sites\/all\/modules\/contrib\/jquery_update\/replace\/ui\/ui\/minified\/jquery.ui.mouse.min.js":1,"sites\/all\/modules\/contrib\/jquery_update\/replace\/ui\/ui\/minified\/jquery.ui.draggable.min.js":1,"sites\/all\/modules\/contrib\/jquery_update\/replace\/ui\/ui\/minified\/jquery.ui.position.min.js":1,"sites\/all\/modules\/contrib\/jquery_update\/replace\/ui\/ui\/minified\/jquery.ui.resizable.min.js":1,"sites\/all\/modules\/contrib\/jquery_update\/replace\/ui\/ui\/minified\/jquery.ui.dialog.min.js":1,"sites\/all\/modules\/contrib\/jquery_update\/replace\/ui\/ui\/minified\/jquery.ui.tooltip.min.js":1,"sites\/all\/modules\/contrib\/jquery_update\/replace\/ui\/ui\/minified\/jquery.ui.accordion.min.js":1,"sites\/all\/libraries\/jquery.bgiframe\/jquery.bgiframe.js":1,"sites\/all\/libraries\/jquery.hoverIntent\/jquery.hoverIntent.js":1,"sites\/all\/libraries\/superfish\/superfish.js":1,"sites\/all\/modules\/contrib\/nice_menus\/js\/nice_menus.js":1,"sites\/all\/modules\/contrib\/eu_cookie_compliance\/js\/jquery.cookie-1.4.1.min.js":1,"sites\/all\/modules\/highwire\/highwire\/js\/highwire.equal-heights.js":1,"sites\/all\/modules\/highwire\/highwire\/js\/highwire.panels-ajax-tab.js":1,"sites\/all\/libraries\/colorbox\/jquery.colorbox-min.js":1,"sites\/all\/modules\/contrib\/colorbox\/js\/colorbox.js":1,"sites\/all\/modules\/contrib\/colorbox\/styles\/default\/colorbox_style.js":1,"https:\/\/scholar.google.com\/scholar_js\/casa.js":1,"sites\/all\/modules\/highwire\/highwire\/highwire_log\/highwire_log.js":1,"sites\/all\/modules\/highwire\/highwire\/highwire_user\/js\/highwire_user_meta.js":1,"sites\/all\/modules\/contrib\/panels_ajax_tab\/js\/panels_ajax_tab.js":1,"sites\/all\/modules\/contrib\/captcha\/captcha.js":1,"misc\/textarea.js":1,"sites\/all\/modules\/contrib\/recaptcha\/js\/recaptcha.js":1,"https:\/\/www.google.com\/recaptcha\/api.js?hl=en\u0026render=explicit\u0026onload=drupalRecaptchaOnload":1,"sites\/all\/modules\/highwire\/highwire\/highwire_citation\/plugins\/content_types\/js\/highwire_citation_export.js":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/js\/highwire_share_dialog.js":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/js\/minipanel_dialog_link.js":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/js\/clipboard.min.js":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/js\/highwire_clipboard.js":1,"sites\/all\/modules\/contrib\/service_links\/js\/twitter_button.js":1,"sites\/all\/modules\/contrib\/service_links\/js\/facebook_like.js":1,"sites\/all\/modules\/contrib\/service_links\/js\/google_plus_one.js":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/js\/highwire_article_nav.js":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/js\/highwire_nav_float.js":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/js\/highwire_citing_links.js":1,"sites\/all\/modules\/highwire\/highwire\/highwire_search\/plugins\/content_types\/js\/highwire_search_similar_articles.js":1,"sites\/all\/modules\/contrib\/panels_accordion\/js\/panels_accordion.js":1,"sites\/all\/modules\/highwire\/highwire\/js\/highwire.article-citation-access.js":1,"\/\/cdn.jsdelivr.net\/qtip2\/2.2.1\/jquery.qtip.min.js":1,"sites\/all\/modules\/highwire\/highwire\/js\/highwire.article-citation-author-tooltip.js":1,"sites\/all\/modules\/highwire\/highwire\/highwire_responsive\/plugins\/styles\/highwire_responsive_toggle\/highwire_responsive_toggle.js":1,"sites\/all\/modules\/contrib\/google_analytics\/googleanalytics.js":1,"https:\/\/www.googletagmanager.com\/gtag\/js?id=G-4CRTLTY8KW":1,"sites\/all\/themes\/highwire\/jcore_1\/js\/theme-scripts.js":1,"sites\/all\/modules\/highwire\/highwire\/highwire_responsive\/js\/highwire-mediaqueries.js":1,"sites\/all\/libraries\/enquire.js\/enquire.min.js":1,"sites\/all\/modules\/contrib\/picture\/picturefill2\/picturefill.min.js":1,"sites\/all\/modules\/contrib\/picture\/picture.min.js":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/js\/highwire_panels_ajax_tab.js":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/highwire_markup_process\/js\/highwire_google_scholar_sprinkle.js":1,"sites\/all\/modules\/highwire\/highwire\/highwire_user\/plugins\/content_types\/js\/highwire_user_salutation.js":1,"sites\/all\/modules\/contrib\/eu_cookie_compliance\/js\/eu_cookie_compliance.js":1,"http:\/\/securepubads.g.doubleclick.net\/tag\/js\/gpt.js":1,"sites\/all\/modules\/highwire\/highwire\/js\/highwire.gtranslate.js":1,"sites\/all\/modules\/highwire\/highwire\/highwire_datalayer\/js\/highwire_datalayer.js":1,"sites\/all\/themes\/contrib\/omega\/omega\/js\/jquery.formalize.js":1,"sites\/all\/themes\/contrib\/omega\/omega\/js\/omega-mediaqueries.js":1,"sites\/all\/themes\/contrib\/omega\/omega\/js\/omega-equalheights.js":1},"css":{"modules\/system\/system.base.css":1,"modules\/system\/system.menus.css":1,"modules\/system\/system.messages.css":1,"modules\/system\/system.theme.css":1,"misc\/ui\/jquery.ui.core.css":1,"misc\/ui\/jquery.ui.theme.css":1,"misc\/ui\/jquery.ui.button.css":1,"misc\/ui\/jquery.ui.resizable.css":1,"misc\/ui\/jquery.ui.dialog.css":1,"misc\/ui\/jquery.ui.tooltip.css":1,"misc\/ui\/jquery.ui.accordion.css":1,"sites\/all\/modules\/contrib\/date\/date_api\/date.css":1,"sites\/all\/modules\/contrib\/date\/date_popup\/themes\/datepicker.1.7.css":1,"modules\/field\/theme\/field.css":1,"sites\/all\/modules\/highwire\/highwire\/highwire_draw\/css\/highwire-draw.css":1,"sites\/all\/modules\/highwire\/highwire\/highwire_folders\/highwire_folders.css":1,"sites\/all\/modules\/highwire\/highwire\/highwire_responsive\/css\/highwire-responsive.css":1,"sites\/all\/modules\/highwire\/highwire\/highwire_saved_searches\/highwire_saved_searches.css":1,"sites\/all\/modules\/highwire\/highwire\/highwire_user\/highwire_user.css":1,"modules\/node\/node.css":1,"sites\/all\/modules\/contrib\/picture\/picture_wysiwyg.css":1,"modules\/search\/search.css":1,"modules\/user\/user.css":1,"sites\/all\/modules\/contrib\/views\/css\/views.css":1,"sites\/all\/modules\/contrib\/ckeditor\/css\/ckeditor.css":1,"sites\/all\/modules\/contrib\/colorbox\/styles\/default\/colorbox_style.css":1,"sites\/all\/modules\/contrib\/ctools\/css\/ctools.css":1,"sites\/all\/modules\/contrib\/google_admanager\/google_admanager.css":1,"sites\/all\/modules\/highwire\/highwire\/highwire.style.highwire.css":1,"sites\/all\/modules\/highwire\/highwire\/css\/nlm-elements.css":1,"sites\/all\/modules\/contrib\/panels\/css\/panels.css":1,"public:\/\/ctools\/css\/263bfdb18936424f0ade19d6bd885f37.css":1,"sites\/all\/modules\/contrib\/panels_ajax_tab\/css\/panels_ajax_tab.css":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/layouts\/highwire_2col_stacked\/highwire-2col-stacked.css":1,"sites\/all\/modules\/contrib\/forward\/forward.css":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/css\/highwire_share_link.css":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/css\/highwire_copy_permalink.css":1,"sites\/all\/modules\/highwire\/highwire\/highwire.style.markup.css":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/css\/highwire_citing_links.css":1,"sites\/all\/modules\/highwire\/highwire\/plugins\/content_types\/css\/highwire_reports_feed.css":1,"sites\/all\/modules\/highwire\/highwire\/css\/highwire-article-citation-list.css":1,"\/\/cdn.jsdelivr.net\/qtip2\/2.2.1\/jquery.qtip.min.css":1,"sites\/all\/modules\/highwire\/highwire\/highwire_responsive\/plugins\/styles\/highwire_responsive_toggle\/highwire_responsive_toggle.css.less":1,"sites\/all\/modules\/contrib\/nice_menus\/css\/nice_menus.css":1,"sites\/all\/modules\/contrib\/nice_menus\/css\/nice_menus_default.css":1,"sites\/all\/modules\/contrib\/panels\/plugins\/layouts\/onecol\/onecol.css":1,"sites\/all\/modules\/contrib\/eu_cookie_compliance\/css\/eu_cookie_compliance.css":1,"sites\/all\/modules\/highwire\/highwire\/css\/highwire.gtranslate.css":1,"sites\/all\/modules\/highwire\/highwire\/highwire_theme_tools\/css\/font-hwicons.css":1,"sites\/all\/modules\/highwire\/highwire\/highwire_theme_tools\/css\/font-hwicons-glyphs.css":1,"sites\/all\/themes\/highwire\/jcore_1\/eu_cookie_compliance.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/font-awesome-ie7.css":1,"sites\/all\/themes\/contrib\/omega\/alpha\/css\/alpha-reset.css":1,"sites\/all\/themes\/contrib\/omega\/alpha\/css\/alpha-mobile.css":1,"sites\/all\/themes\/contrib\/omega\/alpha\/css\/alpha-alpha.css":1,"sites\/all\/themes\/contrib\/omega\/omega\/css\/formalize.css":1,"sites\/all\/themes\/contrib\/omega\/omega\/css\/omega-text.css":1,"sites\/all\/themes\/contrib\/omega\/omega\/css\/omega-branding.css":1,"sites\/all\/themes\/contrib\/omega\/omega\/css\/omega-menu.css":1,"sites\/all\/themes\/contrib\/omega\/omega\/css\/omega-forms.css":1,"sites\/all\/modules\/highwire\/highwire\/css\/highwire-forms.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/mobile-reset.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/font-awesome.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/forms.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/global.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/jquery-ui-elements.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/text.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/eletters.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/colors.css.less":1,"ie::normal::sites\/all\/themes\/highwire\/jcore_1\/css\/jcore-1-jcore-default.css":1,"ie::normal::sites\/all\/themes\/highwire\/jcore_1\/css\/jcore-1-jcore-default-normal.css":1,"ie::normal::sites\/all\/themes\/highwire\/jcore_1\/css\/grid\/jcore_default\/normal\/jcore-default-normal-30.css":1,"narrow::sites\/all\/themes\/highwire\/jcore_1\/css\/jcore-1-jcore-default.css":1,"narrow::sites\/all\/themes\/highwire\/jcore_1\/css\/jcore-1-jcore-default-narrow.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/grid\/jcore_default\/narrow\/jcore-default-narrow-30.css":1,"normal::sites\/all\/themes\/highwire\/jcore_1\/css\/jcore-1-jcore-default.css":1,"normal::sites\/all\/themes\/highwire\/jcore_1\/css\/jcore-1-jcore-default-normal.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/grid\/jcore_default\/normal\/jcore-default-normal-30.css":1,"wide::sites\/all\/themes\/highwire\/jcore_1\/css\/jcore-1-jcore-default.css":1,"wide::sites\/all\/themes\/highwire\/jcore_1\/css\/jcore-1-jcore-default-wide.css":1,"sites\/all\/themes\/highwire\/jcore_1\/css\/grid\/jcore_default\/wide\/jcore-default-wide-30.css":1,"sites\/all\/modules\/shared\/jnl_ajnr_styles\/css\/jnl-ajnr-styles.css.less":1,"sites\/all\/modules\/shared\/jnl_ajnr_styles\/css\/jnl-ajnr-breakpoints.css.less":1}},"colorbox":{"opacity":"0.85","current":"{current} of {total}","previous":"\u00ab Prev","next":"Next \u00bb","close":"Close","maxWidth":"98%","maxHeight":"98%","fixed":true,"mobiledetect":true,"mobiledevicewidth":"480px"},"highwire":{"nid":"14468","apath":"\/ajnr\/37\/5\/818.atom","pisa":"ajnr;37\/5\/818","markup":[{"requested":"index","variant":"index","view":"full","pisa":"ajnr;ajnr.A4679\/DC1"},{"requested":"full-text","variant":"full-text","view":"full","pisa":"ajnr;37\/5\/818"},{"requested":"full-text","variant":"full-text","view":"full","pisa":"ajnr;37\/5\/818"},{"requested":"ref-links","variant":"ref-links","view":"ref-links","pisa":"ajnr;37\/5\/818"},{"requested":"full-text","variant":"full-text","view":"full","pisa":"ajnr;37\/5\/818"},{"requested":"index","variant":"index","view":"full","pisa":"ajnr;ajnr.A4679\/DC1"}],"modal_window_width":"560","share_modal_width":"560","share_modal_title":"Share this Article","ac":{"ajnr;37\/5\/818":{"access":{"full":true},"pisa_id":"ajnr;37\/5\/818","apath":"","jcode":"ajnr"}},"dataLayer":"{\u0022page\u0022:{\u0022hwTitle\u0022:\u0022Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide\u0022,\u0022hwUrl\u0022:\u0022http:\\\/\\\/ajnr-stage2.stage.highwire.org\\\/content\\\/37\\\/5\\\/818\u0022,\u0022hwPath\u0022:\u0022\\\/content\\\/37\\\/5\\\/818\\\/tab-references\u0022,\u0022hwType\u0022:\u0022journal page\u0022},\u0022user\u0022:{\u0022hwMemberID\u0022:\u0022\u0022,\u0022hwLoggedIntoInstitutionID\u0022:\u0022\u0022,\u0022hwLoggedIntoInstitution\u0022:\u0022\u0022,\u0022hwAccessUsageTerms\u0022:\u0022guest\u0022,\u0022hwRegisteredUser\u0022:\u0022no\u0022,\u0022hwHasFullTextAccess\u0022:\u0022yes\u0022,\u0022hwEntitled\u0022:\u0022no\u0022},\u0022content\u0022:{\u0022hwIssueDate\u0022:\u00222016-05-01\u0022,\u0022hwIssueDateTime\u0022:\u00222016-05-01 00:00:00\u0022,\u0022hwPublicationDate\u0022:\u00222016-05-13\u0022,\u0022hwPublicationDateTime\u0022:\u00222016-05-13 08:00:52\u0022,\u0022hwNlmArticleType\u0022:\u0022research-article\u0022,\u0022hwDOI\u0022:\u002210.3174\\\/ajnr.A4679\u0022,\u0022hwAuthors\u0022:\u0022O. Sobczyk,A.P. Crawley,J. Poublanc,K. Sam,D.M. Mandell,D.J. Mikulis,J. Duffin,J.A. Fisher\u0022,\u0022hwContributors\u0022:\u0022\u0022,\u0022hwIsEarlyRelease\u0022:\u0022no\u0022,\u0022hwEissn\u0022:\u00221936-959X\u0022,\u0022hwPissn\u0022:\u00220195-6108\u0022,\u0022hwVolume\u0022:\u002237\u0022,\u0022hwIssue\u0022:\u00225\u0022,\u0022hwArticleType\u0022:\u0022ADULT BRAIN\u0022,\u0022hwTabView\u0022:\u0022main_tab\u0022,\u0022hwViewType\u0022:\u0022full\u0022,\u0022hwAccessType\u0022:\u0022Free\u0022,\u0022hwOpenAccess\u0022:\u0022no\u0022,\u0022hwFreeAccess\u0022:\u0022yes\u0022,\u0022hwTaxonomy\u0022:\u0022\u0022,\u0022hwCorpusCode\u0022:\u0022ajnr\u0022,\u0022hwType\u0022:\u0022article\u0022,\u0022hwSubtitle\u0022:null,\u0022hwOverline\u0022:null,\u0022hwPisaId\u0022:\u0022ajnr;37\\\/5\\\/818\u0022,\u0022hwFirstPage\u0022:\u0022818\u0022,\u0022hwLastPage\u0022:\u0022824\u0022,\u0022hwIsLatestVersion\u0022:\u0022yes\u0022,\u0022hwIsCurrentIssue\u0022:\u0022no\u0022,\u0022hwIsOpenIssue\u0022:\u0022no\u0022,\u0022hwHasFullText\u0022:\u0022yes\u0022,\u0022hwHasPDF\u0022:\u0022yes\u0022,\u0022hwParentTitle\u0022:\u0022American Journal of Neuroradiology: 37 (5)\u0022,\u0022hwElectronicPubDate\u0022:\u00222016-05-13\u0022,\u0022hwElectronicPubDateTime\u0022:\u00222016-05-13 08:00:52\u0022}}"},"highwire_panel_tabs":[{"panel_name":"jnl_ajnr_tab_pdf","panel_ajax_tab":"jnl_ajnr_tab_pdf"}],"panel_ajax_tab":{"path":"sites\/all\/modules\/contrib\/panels_ajax_tab"},"urlIsAjaxTrusted":{"\/content\/37\/5\/818\/tab-references":true},"ws_fl":{"width":100,"height":21},"ws_gpo":{"size":"","annotation":"","lang":"","callback":"","width":300},"highwire_search_similar_articles":{"highwire-search-similar-articles-list-1":{"conf":{"context":"requiredcontext_entity:node_1","override_title":1,"override_title_text":"\u003Ci class=\u0022icon-caret-right\u0022\u003E\u003C\/i\u003E Similar Articles","number_per_page":"5","show_pager":0,"more_link_path":"similar\/articles","more_link":1,"empty_message":"No similar articles are available.","citation_style":"jcore_standard","title_type":"prefer_short","title_as_link":0,"display_subtitle":0,"choose_pubdate":"ppubdate","display_markup_snippet":"","display_original_link":0,"display_access_indicator":0,"display_cme_link":0,"display_access_indicator_text":0,"display_highlight_image":"0","display_variants":0,"display_supplements":0,"display_abstract_tooltip":0,"display_author_tooltip":0,"override_title_heading":"h2","citation_settings_source":"citation_manager","citation_manager_wrapper":{"citation_manager_citation":"jcore_list_title_only"},"corpus_config_wrapper":{"corpus_config_citation_context":[]},"cache_enabled":1,"cache_time":"600","short_title_options":{"char_count":"50","add_ellipsis":0},"access_indicator_settings":{"open_access":{"icon":"icon-unlock","title":"Open Access"},"user_access":{"icon":"icon-ok-sign","title":"You have access"},"no_access":{"icon":"icon-lock","title":"Restricted access"}},"pdf_download":{"display_pdf_download":0,"pdf_download_icon":"icon-cloud-download","pdf_download_text":"PDF"},"include_on_behalf":1,"show_mark_citation":0,"display_infotrieve_link":0,"infotrieve_link_settings":{"icon":"icon-usd","link_caption":"Order full text via Infotrieve"},"highlight_image_style":"","featured_image_variant":"large","featured_image_click_image":"colorbox","display_google_scholar_tooltip":1,"display_pubmed_tooltip":1,"display_advanced_search_tooltip":1,"display_author_landing_page_tooltip":1,"display_orcid_tooltip":0,"display_ads_search_tooltip":0,"display_agricola_tooltip":0,"author_site_search_path":"","display_translations":0,"display_translations_text":"","display_translations_text_icon":"","bundle_overrides_checkboxes":{"highwire_book_fragment":{"selector":0},"highwire_news_story":{"selector":0},"highwire_book_edition":{"selector":0},"highwire_article":{"selector":0},"highwire_issue":{"selector":0},"highwire_comment":{"selector":0},"highwire_fragment":{"selector":0},"highwire_book_section":{"selector":0},"highwire_journal":{"selector":0}},"bundle_overrides":{"highwire_book_fragment":{"selector":0,"citation_style":"jcore_title_and_author","cache_enabled":1,"cache_time":"600","title_type":"full","short_title_options":{"char_count":"50","add_ellipsis":0},"title_as_link":0,"display_subtitle":0,"choose_pubdate":"ppubdate","display_markup_snippet":"","highlight_image_toggle":0,"display_original_link":0,"display_access_indicator":"0","access_indicator_settings":{"open_access":{"icon":"icon-unlock","title":"Open Access"},"user_access":{"icon":"icon-ok-sign","title":"You have access"},"no_access":{"icon":"icon-lock","title":"Restricted access"}},"display_variants":0,"display_supplements":0,"pdf_download":{"display_pdf_download":0,"pdf_download_icon":"icon-cloud-download","pdf_download_text":"PDF"},"include_on_behalf":1,"cpath_prefix":"\/content","show_mark_citation":0,"display_infotrieve_link":0,"infotrieve_link_settings":{"icon":"icon-usd","link_caption":"Order full text via Infotrieve"},"display_highlight_image":0,"highlight_image_style":"thumbnail","display_fragment_caption":1,"display_parent_citation":1,"parent_citation_type":"highwire_book_section","parent_citation_settings":{"citation_style":"folio_book_sections_standard","cache_enabled":1,"cache_time":"600","title_type":"full","short_title_options":{"char_count":"50","add_ellipsis":0},"title_as_link":0,"display_subtitle":0,"choose_pubdate":"ppubdate","display_markup_snippet":"","highlight_image_toggle":0,"display_original_link":0,"display_access_indicator":0,"access_indicator_settings":{"open_access":{"icon":"icon-unlock","title":"Open Access"},"user_access":{"icon":"icon-ok-sign","title":"You have access"},"no_access":{"icon":"icon-lock","title":"Restricted access"}},"display_variants":0,"display_supplements":0,"pdf_download":{"display_pdf_download":0,"pdf_download_icon":"icon-cloud-download","pdf_download_text":"PDF"},"include_on_behalf":1,"cpath_prefix":"\/content","show_mark_citation":0,"display_infotrieve_link":0,"infotrieve_link_settings":{"icon":"icon-usd","link_caption":"Order full text via Infotrieve"},"display_highlight_image":0,"highlight_image_style":"","display_abstract_tooltip":0,"display_author_tooltip":0,"display_google_scholar_tooltip":1,"display_pubmed_tooltip":1,"display_advanced_search_tooltip":1,"display_author_landing_page_tooltip":0,"author_site_search_path":"search\/"}},"highwire_news_story":{"selector":0,"citation_style":"mla","cache_enabled":1,"cache_time":"600","title_type":"full","short_title_options":{"char_count":"50","add_ellipsis":0},"title_as_link":0,"display_subtitle":0,"choose_pubdate":"ppubdate","display_markup_snippet":"","highlight_image_toggle":0,"display_original_link":0,"display_access_indicator":0,"access_indicator_settings":{"open_access":{"icon":"icon-unlock","title":"Open Access"},"user_access":{"icon":"icon-ok-sign","title":"You have access"},"no_access":{"icon":"icon-lock","title":"Restricted access"}},"display_variants":0,"display_supplements":0,"pdf_download":{"display_pdf_download":0,"pdf_download_icon":"icon-cloud-download","pdf_download_text":"PDF"},"include_on_behalf":1,"cpath_prefix":"\/content","show_mark_citation":0,"display_infotrieve_link":0,"infotrieve_link_settings":{"icon":"icon-usd","link_caption":"Order full text via Infotrieve"},"display_highlight_image":"0","highlight_image_style":"","featured_image_click_image":"nothing","display_author_tooltip":0,"display_google_scholar_tooltip":0,"display_pubmed_tooltip":0,"display_advanced_search_tooltip":0},"highwire_book_edition":{"selector":0,"citation_style":"folio_books_standard","cache_enabled":1,"cache_time":"600","title_type":"full","short_title_options":{"char_count":"50","add_ellipsis":0},"title_as_link":0,"display_subtitle":0,"choose_pubdate":"ppubdate","display_markup_snippet":"","highlight_image_toggle":0,"display_original_link":0,"display_access_indicator":0,"access_indicator_settings":{"open_access":{"icon":"icon-unlock","title":"Open Access"},"user_access":{"icon":"icon-ok-sign","title":"You have access"},"no_access":{"icon":"icon-lock","title":"Restricted access"}},"display_variants":0,"display_supplements":0,"pdf_download":{"display_pdf_download":0,"pdf_download_icon":"icon-cloud-download","pdf_download_text":"PDF"},"include_on_behalf":1,"cpath_prefix":"\/content","show_mark_citation":0,"display_infotrieve_link":0,"infotrieve_link_settings":{"icon":"icon-usd","link_caption":"Order full text via Infotrieve"},"display_highlight_image":0,"highlight_image_style":"","display_author_tooltip":0,"display_google_scholar_tooltip":1,"display_pubmed_tooltip":1,"display_advanced_search_tooltip":1,"display_author_landing_page_tooltip":1,"display_orcid_tooltip":1,"author_site_search_path":"search\/"},"highwire_article":{"selector":0,"citation_style":"mla","cache_enabled":1,"cache_time":"600","title_type":"full","short_title_options":{"char_count":"50","add_ellipsis":0},"title_as_link":0,"display_subtitle":0,"choose_pubdate":"ppubdate","display_markup_snippet":"","highlight_image_toggle":0,"display_original_link":0,"display_access_indicator":0,"access_indicator_settings":{"open_access":{"icon":"icon-unlock","title":"Open Access"},"user_access":{"icon":"icon-ok-sign","title":"You have access"},"no_access":{"icon":"icon-lock","title":"Restricted access"}},"display_variants":0,"display_supplements":0,"pdf_download":{"display_pdf_download":0,"pdf_download_icon":"icon-cloud-download","pdf_download_text":"PDF"},"include_on_behalf":0,"cpath_prefix":"\/content","show_mark_citation":0,"display_infotrieve_link":0,"infotrieve_link_settings":{"icon":"icon-usd","link_caption":"Order full text via Infotrieve"},"display_highlight_image":"0","highlight_image_style":"","featured_image_variant":"large","featured_image_click_image":"nothing","display_cme_link":0,"display_abstract_tooltip":0,"display_author_tooltip":0,"display_google_scholar_tooltip":1,"display_pubmed_tooltip":1,"display_advanced_search_tooltip":1,"display_author_landing_page_tooltip":1,"display_orcid_tooltip":1,"display_ads_search_tooltip":0,"display_agricola_tooltip":0,"author_site_search_path":"search\/","display_translations":0,"display_translations_text":"Translations Available","display_translations_text_icon":"icon-globe"},"highwire_issue":{"selector":0,"citation_style":"mla","cache_enabled":1,"cache_time":"600","title_type":"full","short_title_options":{"char_count":"50","add_ellipsis":0},"title_as_link":0,"display_subtitle":0,"choose_pubdate":"ppubdate","display_markup_snippet":"","highlight_image_toggle":0,"display_original_link":0,"display_access_indicator":0,"access_indicator_settings":{"open_access":{"icon":"icon-unlock","title":"Open Access"},"user_access":{"icon":"icon-ok-sign","title":"You have access"},"no_access":{"icon":"icon-lock","title":"Restricted access"}},"display_variants":0,"display_supplements":0,"pdf_download":{"display_pdf_download":0,"pdf_download_icon":"icon-cloud-download","pdf_download_text":"PDF"},"include_on_behalf":1,"cpath_prefix":"\/content","show_mark_citation":0,"display_infotrieve_link":0,"infotrieve_link_settings":{"icon":"icon-usd","link_caption":"Order full text via Infotrieve"},"display_highlight_image":0,"highlight_image_style":"","featured_image_click_image":"nothing","display_author_tooltip":0,"display_google_scholar_tooltip":1,"display_pubmed_tooltip":1,"display_advanced_search_tooltip":1,"display_author_landing_page_tooltip":0,"display_orcid_tooltip":1,"author_site_search_path":"search\/"},"highwire_comment":{"selector":0,"citation_style":"highwire_comment","show_title":0,"title_as_link":0,"title_as_link_type":"tab_view","author_format_type":"fullname","author_format_custom":"","author_list_separator":", ","date_format":"(j F Y)","display_comment_body":1,"display_attachment":1,"display_conflict_of_interest":1},"highwire_fragment":{"selector":0,"citation_style":"jcore_title_and_author","cache_enabled":1,"cache_time":"600","title_type":"full","short_title_options":{"char_count":"50","add_ellipsis":0},"title_as_link":0,"display_subtitle":0,"choose_pubdate":"ppubdate","display_markup_snippet":"","highlight_image_toggle":0,"display_original_link":0,"display_access_indicator":"0","access_indicator_settings":{"open_access":{"icon":"icon-unlock","title":"Open Access"},"user_access":{"icon":"icon-ok-sign","title":"You have access"},"no_access":{"icon":"icon-lock","title":"Restricted access"}},"display_variants":0,"display_supplements":0,"pdf_download":{"display_pdf_download":0,"pdf_download_icon":"icon-cloud-download","pdf_download_text":"PDF"},"include_on_behalf":1,"cpath_prefix":"\/content","show_mark_citation":0,"display_infotrieve_link":0,"infotrieve_link_settings":{"icon":"icon-usd","link_caption":"Order full text via Infotrieve"},"display_highlight_image":0,"highlight_image_style":"","display_fragment_caption":1,"fragment_image_settings":{"fragment_image_variant":"medium","fragment_click_image":"colorbox","show_download_links":1},"display_parent_citation":1,"parent_citation_type":"highwire_article","parent_citation_settings":{"citation_style":"mla","cache_enabled":1,"cache_time":"600","title_type":"full","short_title_options":{"char_count":"50","add_ellipsis":0},"title_as_link":0,"display_subtitle":0,"choose_pubdate":"ppubdate","display_markup_snippet":"","highlight_image_toggle":0,"display_original_link":0,"display_access_indicator":0,"access_indicator_settings":{"open_access":{"icon":"icon-unlock","title":"Open Access"},"user_access":{"icon":"icon-ok-sign","title":"You have access"},"no_access":{"icon":"icon-lock","title":"Restricted access"}},"display_variants":0,"display_supplements":0,"pdf_download":{"display_pdf_download":0,"pdf_download_icon":"icon-cloud-download","pdf_download_text":"PDF"},"include_on_behalf":0,"cpath_prefix":"\/content","show_mark_citation":0,"display_infotrieve_link":0,"infotrieve_link_settings":{"icon":"icon-usd","link_caption":"Order full text via Infotrieve"},"display_highlight_image":"0","highlight_image_style":"","featured_image_variant":"large","featured_image_click_image":"nothing","display_cme_link":0,"display_abstract_tooltip":0,"display_author_tooltip":0,"display_google_scholar_tooltip":1,"display_pubmed_tooltip":1,"display_advanced_search_tooltip":1,"display_author_landing_page_tooltip":1,"display_orcid_tooltip":1,"display_ads_search_tooltip":0,"display_agricola_tooltip":0,"author_site_search_path":"search\/","display_translations":0,"display_translations_text":"Translations Available","display_translations_text_icon":"icon-globe"}},"highwire_book_section":{"selector":0,"citation_style":"folio_book_sections_standard","cache_enabled":1,"cache_time":"600","title_type":"full","short_title_options":{"char_count":"50","add_ellipsis":0},"title_as_link":0,"display_subtitle":0,"choose_pubdate":"ppubdate","display_markup_snippet":"","highlight_image_toggle":0,"display_original_link":0,"display_access_indicator":0,"access_indicator_settings":{"open_access":{"icon":"icon-unlock","title":"Open Access"},"user_access":{"icon":"icon-ok-sign","title":"You have access"},"no_access":{"icon":"icon-lock","title":"Restricted access"}},"display_variants":0,"display_supplements":0,"pdf_download":{"display_pdf_download":0,"pdf_download_icon":"icon-cloud-download","pdf_download_text":"PDF"},"include_on_behalf":1,"cpath_prefix":"\/content","show_mark_citation":0,"display_infotrieve_link":0,"infotrieve_link_settings":{"icon":"icon-usd","link_caption":"Order full text via Infotrieve"},"display_highlight_image":0,"highlight_image_style":"","display_abstract_tooltip":0,"display_author_tooltip":0,"display_google_scholar_tooltip":1,"display_pubmed_tooltip":1,"display_advanced_search_tooltip":1,"display_author_landing_page_tooltip":0,"author_site_search_path":"search\/"},"highwire_journal":{"selector":0,"citation_style":"mla","cache_enabled":1,"cache_time":"600","title_type":"full","short_title_options":{"char_count":"50","add_ellipsis":0},"title_as_link":0,"display_subtitle":0,"choose_pubdate":"ppubdate","display_markup_snippet":"","highlight_image_toggle":0,"display_original_link":0,"display_access_indicator":0,"access_indicator_settings":{"open_access":{"icon":"icon-unlock","title":"Open Access"},"user_access":{"icon":"icon-ok-sign","title":"You have access"},"no_access":{"icon":"icon-lock","title":"Restricted access"}},"display_variants":0,"display_supplements":0,"pdf_download":{"display_pdf_download":0,"pdf_download_icon":"icon-cloud-download","pdf_download_text":"PDF"},"include_on_behalf":1,"cpath_prefix":"\/content","show_mark_citation":0,"display_infotrieve_link":0,"infotrieve_link_settings":{"icon":"icon-usd","link_caption":"Order full text via Infotrieve"},"display_highlight_image":0,"highlight_image_style":"","display_author_tooltip":0,"display_google_scholar_tooltip":1,"display_pubmed_tooltip":1,"display_advanced_search_tooltip":1,"display_author_landing_page_tooltip":0,"display_orcid_tooltip":1,"author_site_search_path":"search\/"}},"cpath_prefix":"\/content","ajax_loading_icon_classes":"icon-spinner icon-spin icon-2x","ajax_loading_text":"","highlight_image_toggle":0,"more_link_label":"See more","url_parameters":{"q":"node\/14468","panels_ajax_tab_tab":"jnl_ajnr_tab_refs","panels_ajax_tab_trigger":"tab-references"}},"nid":"14468"}},"panels_accordion":{"highwire_article_accordion_container":{"heightStyle":"content","autoHeight":false,"collapsible":0,"region_accordion_id":"highwire_article_accordion_container","active":0,"animated":"slide"}},"color":{"logo":"http:\/\/ajnr-stage2.stage.highwire.org\/sites\/default\/files\/ajnr-web-logo_0.png"},"instances":"{\u0022highwire_abstract_tooltip\u0022:{\u0022content\u0022:{\u0022text\u0022:\u0022\u0022},\u0022style\u0022:{\u0022tip\u0022:{\u0022width\u0022:20,\u0022height\u0022:20,\u0022border\u0022:1,\u0022offset\u0022:0,\u0022corner\u0022:true},\u0022classes\u0022:\u0022qtip-custom hw-tooltip hw-abstract-tooltip qtip-shadow qtip-rounded\u0022,\u0022classes_custom\u0022:\u0022hw-tooltip hw-abstract-tooltip\u0022},\u0022position\u0022:{\u0022at\u0022:\u0022right center\u0022,\u0022my\u0022:\u0022left center\u0022,\u0022viewport\u0022:true,\u0022adjust\u0022:{\u0022method\u0022:\u0022shift\u0022}},\u0022show\u0022:{\u0022event\u0022:\u0022mouseenter click \u0022,\u0022solo\u0022:true},\u0022hide\u0022:{\u0022event\u0022:\u0022mouseleave \u0022,\u0022fixed\u0022:1,\u0022delay\u0022:\u0022100\u0022}},\u0022highwire_author_tooltip\u0022:{\u0022content\u0022:{\u0022text\u0022:\u0022\u0022},\u0022style\u0022:{\u0022tip\u0022:{\u0022width\u0022:15,\u0022height\u0022:15,\u0022border\u0022:1,\u0022offset\u0022:0,\u0022corner\u0022:true},\u0022classes\u0022:\u0022qtip-custom hw-tooltip hw-author-tooltip qtip-shadow qtip-rounded\u0022,\u0022classes_custom\u0022:\u0022hw-tooltip hw-author-tooltip\u0022},\u0022position\u0022:{\u0022at\u0022:\u0022top center\u0022,\u0022my\u0022:\u0022bottom center\u0022,\u0022viewport\u0022:true,\u0022adjust\u0022:{\u0022method\u0022:\u0022\u0022}},\u0022show\u0022:{\u0022event\u0022:\u0022mouseenter \u0022,\u0022solo\u0022:true},\u0022hide\u0022:{\u0022event\u0022:\u0022mouseleave \u0022,\u0022fixed\u0022:1,\u0022delay\u0022:\u0022100\u0022}},\u0022highwire_reflinks_tooltip\u0022:{\u0022content\u0022:{\u0022text\u0022:\u0022\u0022},\u0022style\u0022:{\u0022tip\u0022:{\u0022width\u0022:15,\u0022height\u0022:15,\u0022border\u0022:1,\u0022mimic\u0022:\u0022top center\u0022,\u0022offset\u0022:0,\u0022corner\u0022:true},\u0022classes\u0022:\u0022qtip-custom hw-tooltip hw-ref-link-tooltip qtip-shadow qtip-rounded\u0022,\u0022classes_custom\u0022:\u0022hw-tooltip hw-ref-link-tooltip\u0022},\u0022position\u0022:{\u0022at\u0022:\u0022bottom left\u0022,\u0022my\u0022:\u0022top left\u0022,\u0022viewport\u0022:true,\u0022adjust\u0022:{\u0022method\u0022:\u0022flip\u0022}},\u0022show\u0022:{\u0022event\u0022:\u0022mouseenter \u0022,\u0022solo\u0022:true},\u0022hide\u0022:{\u0022event\u0022:\u0022mouseleave \u0022,\u0022fixed\u0022:1,\u0022delay\u0022:\u0022100\u0022}}}","qtipDebug":"{\u0022leaveElement\u0022:0}","nice_menus_options":{"delay":800,"speed":"fast"},"highwireResponsive":{"enquire_enabled":1,"breakpoints_configured":1,"breakpoints":{"zero":"all and (min-width: 0px)","xsmall":"all and (min-width: 380px)","narrow":"all and (min-width: 768px) and (min-device-width: 768px), (max-device-width: 800px) and (min-width: 768px) and (orientation:landscape)","normal":"all and (min-width: 980px) and (min-device-width: 980px), all and (max-device-width: 1024px) and (min-width: 1024px) and (orientation:landscape)","wide":"all and (min-width: 1220px)"}},"eu_cookie_compliance":{"popup_enabled":1,"popup_agreed_enabled":0,"popup_hide_agreed":false,"popup_clicking_confirmation":true,"popup_scrolling_confirmation":false,"popup_html_info":"\u003Cdiv\u003E\n  \u003Cdiv class=\u0022popup-content info\u0022\u003E\n    \u003Cdiv id=\u0022popup-text\u0022\u003E\n      \u003Cp\u003EWe use cookies on this site to enhance your user experience. By clicking any link on this page you are giving your consent for us to set cookies.\u003C\/p\u003E\n    \u003C\/div\u003E\n    \u003Cdiv id=\u0022popup-buttons\u0022\u003E\n      \u003Cbutton type=\u0022button\u0022 role=\u0022dialog\u0022 aria-labelledby=\u0022Continue\u0022\n        class=\u0022agree-button eu-cookie-compliance-default-button\u0022\u003EContinue\u003C\/button\u003E\n                  \u003Cbutton type=\u0022button\u0022 role=\u0022dialog\u0022 aria-labelledby=\u0022Find out more\u0022\n        class=\u0022find-more-button eu-cookie-compliance-more-button\u0022\u003EFind out more\u003C\/button\u003E\n          \u003C\/div\u003E\n  \u003C\/div\u003E\n\u003C\/div\u003E","use_mobile_message":false,"mobile_popup_html_info":"\u003Cdiv\u003E\n  \u003Cdiv class=\u0022popup-content info\u0022\u003E\n    \u003Cdiv id=\u0022popup-text\u0022\u003E\n          \u003C\/div\u003E\n    \u003Cdiv id=\u0022popup-buttons\u0022\u003E\n      \u003Cbutton type=\u0022button\u0022 role=\u0022dialog\u0022 aria-labelledby=\u0022Continue\u0022\n        class=\u0022agree-button eu-cookie-compliance-default-button\u0022\u003EContinue\u003C\/button\u003E\n                  \u003Cbutton type=\u0022button\u0022 role=\u0022dialog\u0022 aria-labelledby=\u0022Find out more\u0022\n        class=\u0022find-more-button eu-cookie-compliance-more-button\u0022\u003EFind out more\u003C\/button\u003E\n          \u003C\/div\u003E\n  \u003C\/div\u003E\n\u003C\/div\u003E","mobile_breakpoint":"768","popup_html_agreed":"\u003Cdiv\u003E\n  \u003Cdiv class=\u0022popup-content agreed\u0022\u003E\n    \u003Cdiv id=\u0022popup-text\u0022\u003E\n      \u003Cp\u003EThank you for accepting cookies. You can now hide this message or find out more about cookies.\u003C\/p\u003E\n    \u003C\/div\u003E\n    \u003Cdiv id=\u0022popup-buttons\u0022\u003E\n      \u003Cbutton type=\u0022button\u0022 class=\u0022hide-popup-button eu-cookie-compliance-hide-button\u0022\u003EHide\u003C\/button\u003E\n              \u003Cbutton type=\u0022button\u0022 class=\u0022find-more-button eu-cookie-compliance-more-button-thank-you\u0022 \u003EFind out more\u003C\/button\u003E\n          \u003C\/div\u003E\n  \u003C\/div\u003E\n\u003C\/div\u003E","popup_use_bare_css":false,"popup_height":"auto","popup_width":"100%","popup_delay":1000,"popup_link":"\/help\/cookie-policy","popup_link_new_window":1,"popup_position":null,"popup_language":"en","store_consent":false,"better_support_for_screen_readers":0,"reload_page":0,"domain":"","popup_eu_only_js":0,"cookie_lifetime":365,"cookie_session":false,"disagree_do_not_show_popup":0,"method":"default","whitelisted_cookies":"","withdraw_markup":"\u003Cbutton type=\u0022button\u0022 class=\u0022eu-cookie-withdraw-tab\u0022\u003EPrivacy settings\u003C\/button\u003E\n\u003Cdiv class=\u0022eu-cookie-withdraw-banner\u0022\u003E\n  \u003Cdiv class=\u0022popup-content info\u0022\u003E\n    \u003Cdiv id=\u0022popup-text\u0022\u003E\n      \u003Cp\u003E\u0026lt;h2\u0026gt;We use cookies on this site to enhance your user experience\u0026lt;\/h2\u0026gt;\u0026lt;p\u0026gt;You have given your consent for us to set cookies.\u0026lt;\/p\u0026gt;\u003C\/p\u003E\n    \u003C\/div\u003E\n    \u003Cdiv id=\u0022popup-buttons\u0022\u003E\n      \u003Cbutton type=\u0022button\u0022 class=\u0022eu-cookie-withdraw-button\u0022\u003EWithdraw consent\u003C\/button\u003E\n    \u003C\/div\u003E\n  \u003C\/div\u003E\n\u003C\/div\u003E\n","withdraw_enabled":false},"googleanalytics":{"account":["G-4CRTLTY8KW"],"trackOutbound":1,"trackMailto":1,"trackDownload":1,"trackDownloadExtensions":"7z|aac|arc|arj|asf|asx|avi|bin|csv|doc(x|m)?|dot(x|m)?|exe|flv|gif|gz|gzip|hqx|jar|jpe?g|js|mp(2|3|4|e?g)|mov(ie)?|msi|msp|pdf|phps|png|ppt(x|m)?|pot(x|m)?|pps(x|m)?|ppam|sld(x|m)?|thmx|qtm?|ra(m|r)?|sea|sit|tar|tgz|torrent|txt|wav|wma|wmv|wpd|xls(x|m|b)?|xlt(x|m)|xlam|xml|z|zip","trackColorbox":1},"omega":{"layouts":{"primary":"normal","order":["narrow","normal","wide"],"queries":{"narrow":"all and (min-width: 768px) and (min-device-width: 768px), (max-device-width: 800px) and (min-width: 768px) and (orientation:landscape)","normal":"all and (min-width: 980px) and (min-device-width: 980px), all and (max-device-width: 1024px) and (min-width: 1024px) and (orientation:landscape)","wide":"all and (min-width: 1220px)"}}}});
//--><!]]>
</script>
    <!--[if lt IE 9]><script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script><![endif]-->
  </head>
  <body class="html not-front not-logged-in page-node page-node- page-node-14468 node-type-highwire-article context-content hw-default-jcode-ajnr hw-article-type-research-article hw-article-category-adult-brain">
<!-- Google Tag Manager -->
<noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-MXP45WNH" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<script type="text/javascript">(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0];var j=d.createElement(s);var dl=l!='dataLayer'?'&l='+l:'';j.src='//www.googletagmanager.com/gtm.js?id='+i+dl;j.type='text/javascript';j.async=true;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-MXP45WNH');</script>
<!-- End Google Tag Manager -->
    <div id="skip-link">
      <a href="#main-content" class="element-invisible element-focusable">Skip to main content</a>
    </div>
    <div class="region region-page-top" id="region-page-top">
  <div class="region-inner region-page-top-inner">
      </div>
</div>    <div class="page clearfix footer-borders panels-page panels-layout-jcore_2col" id="page">
      <header id="section-header" class="section section-header">
  <div id="zone-advertising-top-wrapper" class="zone-wrapper zone-advertising-top-wrapper clearfix">  
  <div id="zone-advertising-top" class="zone zone-advertising-top clearfix container-30">
    <div class="grid-28 suffix-1 prefix-1 region region-ad-top" id="region-ad-top">
  <div class="region-inner region-ad-top-inner">
    <div class="block block-panels-mini mobile-hiddens rtecenter block-jnl-ajnr-ad-leaderboard block-panels-mini-jnl-ajnr-ad-leaderboard odd block-without-title" id="block-panels-mini-jnl-ajnr-ad-leaderboard">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_ad_leaderboard">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-dfp-pane text-center" >
  
      
  
  <div class="pane-content">
    <div id="dfp-ad-top_leaderboard-wrapper" class="dfp-tag-wrapper">
<div class="slug">Advertisement</div>
<div  id="dfp-ad-top_leaderboard" class="dfp-tag-wrapper">
  <script type="text/javascript">
    googletag.cmd.push(function() {
      googletag.display("dfp-ad-top_leaderboard");
    });
  </script>
</div>
</div>  </div>

  
  </div>
</div>
  </div>
</div>
    </div>
  </div>
</div>  </div>
</div>  </div>
</div><div id="zone-superheader-wrapper" class="zone-wrapper zone-superheader-wrapper clearfix mobile-only print-hidden">  
  <div id="zone-superheader" class="zone zone-superheader clearfix mobile-only print-hidden container-30">
    <div class="grid-30 region region-superheader" id="region-superheader">
  <div class="region-inner region-superheader-inner">
    <div class="block block-panels-mini block-responsive-menu block-panels-mini-responsive-menu odd block-without-title" id="block-panels-mini-responsive-menu">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <div class="panel-display panel-1col clearfix" id="mini-panel-responsive_menu">
  <div class="panel-panel panel-col">
    <div><div id="unique-id3" class="highwire-responsive-toggle-group"><div class="panel-pane pane-panels-mini pane-responsive-menu-main-menu" >
  
        <h2 class="pane-title"><span class="icon-reorder"></span><span class="element-invisible">Main menu</span></h2>
    
  
  <div class="pane-content">
    <div class="panel-display panel-1col clearfix" id="mini-panel-responsive_menu_main_menu">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-menu-tree pane-main-menu" >
  
      
  
  <div class="pane-content">
    <div class="menu-block-wrapper menu-block-ctools-main-menu-1 menu-name-main-menu parent-mlid-main-menu:0 menu-level-1">
  <nav class="menubar-nav"><ul class="menu" role="menu"><li class="first leaf menu-mlid-772" role="menuitem"><a href="/" class="" data-icon-position="" data-hide-link-title="0">Home</a></li>
<li class="expanded active-trail menu-mlid-773" role="menuitem"><a href="/content/current" data-hide-link-title="0" class="active active-trail" data-icon-position="">Content</a><nav class="menubar-nav"><ul class="menu" role="menu"><li class="first expanded menu-mlid-774" role="menuitem"><a href="/content/current" data-hide-link-title="0" class="" data-icon-position="">Current Issue</a></li>
<li class="leaf menu-mlid-1747" role="menuitem"><a href="/content/early/preprint" data-hide-link-title="0" class="" data-icon-position="">Publication Preview--Preprint</a></li>
<li class="leaf menu-mlid-775" role="menuitem"><a href="/content/early/recent" data-hide-link-title="0" class="" data-icon-position="">Publication Preview--Ahead of Print</a></li>
<li class="leaf menu-mlid-776" role="menuitem"><a href="/content/by/year" data-hide-link-title="0" class="" data-icon-position="">Past Issue Archive</a></li>
<li class="leaf menu-mlid-900" role="menuitem"><a href="/cow/by/year" data-hide-link-title="0" class="" data-icon-position="">Case of the Week Archive</a></li>
<li class="leaf menu-mlid-1006" role="menuitem"><a href="/cc/by/year" data-hide-link-title="0" class="" data-icon-position="">Classic Case Archive</a></li>
<li class="leaf menu-mlid-901" role="menuitem"><a href="/com/by/year" data-hide-link-title="0" class="" data-icon-position="">Case of the Month Archive</a></li>
<li class="last leaf menu-mlid-1334" role="menuitem"><a href="http://www.ajnr.org/content/covid-19-content-and-resources" data-hide-link-title="0" class="" data-icon-position="">COVID-19 Content and Resources</a></li>
</ul></nav></li>
<li class="expanded menu-mlid-784" role="menuitem"><a href="/content/about-us" class="" data-icon-position="" data-hide-link-title="0">About Us</a><nav class="menubar-nav"><ul class="menu" role="menu"><li class="first leaf menu-mlid-785" role="menuitem"><a href="/page/content/About" data-hide-link-title="0" class="" data-icon-position="">About AJNR</a></li>
<li class="leaf menu-mlid-899" role="menuitem"><a href="https://www.ajnr.org/page/content/Ed-Board" data-hide-link-title="0" class="" data-icon-position="">Editorial Board</a></li>
<li class="last leaf menu-mlid-864" role="menuitem"><a href="http://www.asnr.org" data-hide-link-title="0" target="_blank" class="" data-icon-position="">American Society of Neuroradiology</a></li>
</ul></nav></li>
<li class="expanded menu-mlid-1746" role="menuitem"><a href="/" class="" data-icon-position="" data-hide-link-title="0">For Authors</a><nav class="menubar-nav"><ul class="menu" role="menu"><li class="first leaf menu-mlid-1725" role="menuitem"><a href="https://www.ajnr.org/content/author-policies" data-hide-link-title="0" class="" data-icon-position="">Author Policies</a></li>
<li class="leaf menu-mlid-1856" role="menuitem"><a href="https://www.ajnr.org/preprint_publishing" data-hide-link-title="0" class="" data-icon-position="">Preprint Publishing</a></li>
<li class="last leaf menu-mlid-1726" role="menuitem"><a href="https://www.ajnr.org/content/manuscript-submission-guidelines" data-hide-link-title="0" class="" data-icon-position="">Manuscript Submission Guidelines</a></li>
</ul></nav></li>
<li class="leaf menu-mlid-862" role="menuitem"><a href="https://mc.manuscriptcentral.com/ajnr" data-hide-link-title="0" target="_blank" class="" data-icon-position="">Submit a Manuscript</a></li>
<li class="expanded menu-mlid-1184" role="menuitem"><a href="/content/about-us" data-hide-link-title="0" class="" data-icon-position="">Special Collections</a><nav class="menubar-nav"><ul class="menu" role="menu"><li class="first leaf menu-mlid-1733" role="menuitem"><a href="http://www.ajnr.org/cc/CSF-Spinal-Leak" data-hide-link-title="0" class="" data-icon-position="">Spinal CSF Leak Articles (Jan 2020-June 2024)</a></li>
<li class="leaf menu-mlid-1185" role="menuitem"><a href="http://www.ajnr.org/cc/most-impactful-ajnr-articles" data-hide-link-title="0" class="" data-icon-position="">Most Impactful AJNR Articles</a></li>
<li class="last leaf menu-mlid-1896" role="menuitem"><a href="http://www.ajnr.org/cc/2024-Awards" data-hide-link-title="0" class="" data-icon-position="">2024 AJNR Journal Awards</a></li>
</ul></nav></li>
<li class="last expanded menu-mlid-788" role="menuitem"><a href="/content/advertising" class="" data-icon-position="" data-hide-link-title="0">More</a><nav class="menubar-nav"><ul class="menu" role="menu"><li class="first leaf menu-mlid-780" role="menuitem"><a href="/content/subscriber-help-and-services" data-hide-link-title="0" class="" data-icon-position="">Subscribers</a></li>
<li class="leaf menu-mlid-863" role="menuitem"><a href="https://marketplace.copyright.com/rs-ui-web/mp/details/journal/122810747" data-hide-link-title="0" class="" data-icon-position="">Permissions</a></li>
<li class="leaf menu-mlid-782" role="menuitem"><a href="/page/content/Ads" data-hide-link-title="0" class="" data-icon-position="">Advertisers</a></li>
<li class="leaf menu-mlid-790" role="menuitem"><a href="/alerts" data-hide-link-title="0" class="" data-icon-position="">Alerts</a></li>
<li class="last leaf menu-mlid-791" role="menuitem"><a href="/feedback" class="" data-icon-position="" data-hide-link-title="0">Feedback</a></li>
</ul></nav></li>
</ul></nav></div>
  </div>

  
  </div>
</div>
  </div>
</div>
  </div>

  
  </div>
<div class="panel-pane pane-panels-mini pane-responsive-menu-user-menu" >
  
        <h2 class="pane-title"><span class="icon-gear"></span><span class="element-invisible">User menu</span></h2>
    
  
  <div class="pane-content">
    <div class="panel-display panel-1col clearfix" id="mini-panel-responsive_menu_user_menu">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-menu-tree pane-user-menu" >
  
      
  
  <div class="pane-content">
    <div class="menu-block-wrapper menu-block-ctools-user-menu-1 menu-name-user-menu parent-mlid-user-menu:0 menu-level-1">
  <nav class="menubar-nav"><ul class="menu" role="menu"><li class="first leaf menu-mlid-801" role="menuitem"><a href="/content/subscriber-help-and-services" data-hide-link-title="0" class="" data-icon-position="">Subscribe</a></li>
<li class="leaf menu-mlid-802" role="menuitem"><a href="/alerts" data-hide-link-title="0" class="" data-icon-position="">Alerts</a></li>
<li class="last leaf menu-mlid-803" role="menuitem"><a href="/user/login?destination=/content/37/5/818%3Fpanels_ajax_tab_tab%3Djnl_ajnr_tab_refs%26panels_ajax_tab_trigger%3Dtab-references" class="" data-icon-position="" data-hide-link-title="0">Log in</a></li>
</ul></nav></div>
  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-highwire-user-identities" >
  
      
  
  <div class="pane-content">
    <div class="highwire-user-message" data-separator="|"><span class="highwire-user-institution" data-id-type="institution" data-identity="a%3A2%3A%7Bs%3A4%3A%22show%22%3Bi%3A1%3Bs%3A7%3A%22message%22%3Bs%3A50%3A%22Institution%3A%20%5Bidentity%3Ainstitutional_display_name%5D%22%3B%7D"></span></div>  </div>

  
  </div>
</div>
  </div>
</div>
  </div>

  
  </div>
<div class="panel-pane pane-panels-mini pane-responsive-menu-search" >
  
        <h2 class="pane-title"><span class="icon-search"></span><span class="element-invisible">Search</span></h2>
    
  
  <div class="pane-content">
    <div class="panel-display panel-1col clearfix" id="mini-panel-responsive_menu_search">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-highwire-seach-qsearch-nocontext" >
  
      
  
  <div class="pane-content">
    <form class="highwire-quicksearch button-style-mini button-style-mini" action="/content/37/5/818/tab-references" method="post" id="highwire-search-qsearch-nocontext-form" accept-charset="UTF-8"><div><div class="form-item form-item-label-invisible form-type-textfield form-item-keywords">
  <label class="element-invisible" for="quick_search_header_keywords_1297311807">Search for this keyword </label>
 <input placeholder="Search..." type="text" id="quick_search_header_keywords_1297311807" name="keywords" value="" size="60" maxlength="128" class="form-text" />
</div>
<div class="button-wrapper button-mini"><span class="icon-search"></span><input data-icon-only="1" data-font-icon="icon-search" data-icon-position="after" type="submit" id="quick_search_header_submit_1021757737" name="op" value="Search" class="form-submit" /></div><input type="hidden" name="form_build_id" value="form-9LYp_0FqXjvlUMbdbGYLRFZdIZ3XYdjK_hbRKMafiEo" />
<input type="hidden" name="form_id" value="highwire_search_qsearch_nocontext_form" />
</div></form>  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-custom pane-1 highwire-responsive-advanced-search-link pane-menu-tree" >
  
      
  
  <div class="pane-content">
    <ul class="menu">
  <li><a href="/search" title="Advanced search">Advanced search</a></li>
  </ul>  </div>

  
  </div>
</div>
  </div>
</div>
  </div>

  
  </div>
</div></div>
  </div>
</div>
    </div>
  </div>
</div><div class="block block-panels-mini block-hw-small-logo block-panels-mini-hw-small-logo even block-without-title" id="block-panels-mini-hw-small-logo">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <div class="panel-display panel-1col clearfix" id="mini-panel-hw_small_logo">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-small-logo" >
  
      
  
  <div class="pane-content">
    <a href="/" class="" data-icon-position="" data-hide-link-title="0"><img src="http://ajnr-stage2.stage.highwire.org/sites/default/files/ajnr-logo.png" alt="American Journal of Neuroradiology" title="American Journal of Neuroradiology" /></a>  </div>

  
  </div>
</div>
  </div>
</div>
    </div>
  </div>
</div>  </div>
</div>  </div>
</div><div id="zone-user-wrapper" class="zone-wrapper zone-user-wrapper clearfix mobile-hidden print-hidden">  
  <div id="zone-user" class="zone zone-user clearfix equal-height-container mobile-hidden print-hidden container-30">    
  	    <div class="grid-30 region region-user-second equal-height-element" id="region-user-second">
  <div class="region-inner region-user-second-inner">
    <div class="block block-panels-mini text-right no-margin-bottom block-jnl-ajnr-uid-strng block-panels-mini-jnl-ajnr-uid-strng odd block-without-title" id="block-panels-mini-jnl-ajnr-uid-strng">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_uid_strng">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-highwire-user-identities" >
  
      
  
  <div class="pane-content">
    <div class="highwire-user-message" data-separator=" | "><span class="highwire-user-institution" data-id-type="institution" data-identity="a%3A2%3A%7Bs%3A4%3A%22show%22%3Bi%3A1%3Bs%3A7%3A%22message%22%3Bs%3A85%3A%22%3Cspan%20class%3D%22narrow-hidden%22%3EInstitution%3A%20%3C%2Fspan%3E%5Bidentity%3Ainstitutional_display_name%5D%22%3B%7D"></span></div>  </div>

  
  </div>
</div>
  </div>
</div>
    </div>
  </div>
</div>  </div>
</div>  </div>
</div>  
  <div id="zone-branding" class="zone zone-branding clearfix mobile-hidden print-display-block container-30">
    <div class="grid-19 prefix-1 region region-branding print-display-block" id="region-branding">
  <div class="region-inner region-branding-inner">
        <div class="branding-data clearfix">
            <div class="logo-img">
        <a href="/" rel="home" class="" data-icon-position="" data-hide-link-title="0"><img alt="American Journal of Neuroradiology" src="http://ajnr-stage2.stage.highwire.org/sites/default/files/ajnr-web-logo_0.png" /></a>      </div>
                        <hgroup class="site-name-slogan element-invisible">        
                                <h2 class="site-name element-invisible"><a href="/" title="Home" class="" data-icon-position="" data-hide-link-title="0">American Journal of Neuroradiology</a></h2>
                              </hgroup>
          </div>
          </div>
</div><div class="grid-9 suffix-1 region region-branding-second print-hidden" id="region-branding-second">
  <div class="region-inner region-branding-second-inner">
    <div class="block block-panels-mini text-right no-margin-bottom block-jnl-ajnr-user-menu block-panels-mini-jnl-ajnr-user-menu odd block-without-title" id="block-panels-mini-jnl-ajnr-user-menu">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_user_menu">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-block pane-system-user-menu links inline pane-system" >
  
      
  
  <div class="pane-content">
    <nav class="menubar-nav"><ul class="menu" role="menu"><li class="first leaf" role="menuitem"><a href="/content/subscriber-help-and-services" data-hide-link-title="0" class="" data-icon-position="">Subscribe</a></li>
<li class="leaf" role="menuitem"><a href="/alerts" data-hide-link-title="0" class="" data-icon-position="">Alerts</a></li>
<li class="last leaf" role="menuitem"><a href="/user/login?destination=/content/37/5/818%3Fpanels_ajax_tab_tab%3Djnl_ajnr_tab_refs%26panels_ajax_tab_trigger%3Dtab-references" class="" data-icon-position="" data-hide-link-title="0">Log in</a></li>
</ul></nav>  </div>

  
  </div>
</div>
  </div>
</div>
    </div>
  </div>
</div><div class="block block-panels-mini block-jnl-ajnr-search-box block-panels-mini-jnl-ajnr-search-box even block-without-title" id="block-panels-mini-jnl-ajnr-search-box">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_search_box">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-highwire-seach-quicksearch no-margin-bottom" >
  
      
  
  <div class="pane-content">
    <form class="highwire-quicksearch button-style-mini button-style-mini" action="/content/37/5/818/tab-references" method="post" id="highwire-search-quicksearch-form-0" accept-charset="UTF-8"><div><div class="form-item form-item-label-invisible form-type-textfield form-item-keywords">
  <label class="element-invisible" for="search_rightsidebar_keywords_77761514">Search for this keyword </label>
 <input placeholder="search" type="text" id="search_rightsidebar_keywords_77761514" name="keywords" value="" size="60" maxlength="128" class="form-text" />
</div>
<div class="button-wrapper button-mini"><span class="icon-search"></span><input data-icon-only="1" data-font-icon="icon-search" data-icon-position="after" type="submit" id="search_rightsidebar_submit_588078034" name="op" value="Search" class="form-submit" /></div><input type="hidden" name="form_build_id" value="form-0tRkbqFn6iGqouPPNUB_nXOoLrwFEQigw7XdnRFdHV8" />
<input type="hidden" name="form_id" value="highwire_search_quicksearch_form_0" />
</div></form>  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-custom pane-2" >
  
      
  
  <div class="pane-content">
    <p><a href="/search">Advanced Search</a></p>  </div>

  
  </div>
</div>
  </div>
</div>
    </div>
  </div>
</div>  </div>
</div>  </div>
  
  <div id="zone-menu" class="zone zone-menu clearfix mobile-hidden container-30">
    <div class="grid-28 suffix-1 prefix-1 region region-menu region-menu-bg-opaque region-menu-no-border" id="region-menu">
  <div class="region-inner region-menu-inner">
        <div class="block block-nice-menus block-1 block-nice-menus-1 odd block-without-title" id="block-nice-menus-1">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <nav class="menubar-nav"><ul class="nice-menu nice-menu-down nice-menu-main-menu" id="nice-menu-1" role="menu"><li class="menu-772 menu-path-front first odd " role="menuitem"><a href="/" class="" data-icon-position="" data-hide-link-title="0">Home</a></li>
<li class="menu-773 menuparent  menu-path-content-current active-trail  even " role="menuitem"><a href="/content/current" data-hide-link-title="0" class="active" data-icon-position="">Content</a><ul role="menu"><li class="menu-774 menu-path-content-current first odd " role="menuitem"><a href="/content/current" data-hide-link-title="0" class="" data-icon-position="">Current Issue</a></li>
<li class="menu-1747 menu-path-content-early-preprint  even " role="menuitem"><a href="/content/early/preprint" data-hide-link-title="0" class="" data-icon-position="">Publication Preview--Preprint</a></li>
<li class="menu-775 menu-path-content-early-recent  odd " role="menuitem"><a href="/content/early/recent" data-hide-link-title="0" class="" data-icon-position="">Publication Preview--Ahead of Print</a></li>
<li class="menu-776 menu-path-content-by-year  even " role="menuitem"><a href="/content/by/year" data-hide-link-title="0" class="" data-icon-position="">Past Issue Archive</a></li>
<li class="menu-900 menu-path-cow-by-year  odd " role="menuitem"><a href="/cow/by/year" data-hide-link-title="0" class="" data-icon-position="">Case of the Week Archive</a></li>
<li class="menu-1006 menu-path-cc-by-year  even " role="menuitem"><a href="/cc/by/year" data-hide-link-title="0" class="" data-icon-position="">Classic Case Archive</a></li>
<li class="menu-901 menu-path-com-by-year  odd " role="menuitem"><a href="/com/by/year" data-hide-link-title="0" class="" data-icon-position="">Case of the Month Archive</a></li>
<li class="menu-1334 menu-path-ajnrorg-content-covid-19-content-and-resources  even last" role="menuitem"><a href="http://www.ajnr.org/content/covid-19-content-and-resources" data-hide-link-title="0" class="" data-icon-position="">COVID-19 Content and Resources</a></li>
</ul></li>
<li class="menu-784 menuparent  menu-path-node-7  odd " role="menuitem"><a href="/content/about-us" class="" data-icon-position="" data-hide-link-title="0">About Us</a><ul role="menu"><li class="menu-785 menu-path-node-935 first odd " role="menuitem"><a href="/page/content/About" data-hide-link-title="0" class="" data-icon-position="">About AJNR</a></li>
<li class="menu-899 menu-path-sajnrorg-page-content-ed-board  even " role="menuitem"><a href="https://www.ajnr.org/page/content/Ed-Board" data-hide-link-title="0" class="" data-icon-position="">Editorial Board</a></li>
<li class="menu-864 menu-path-asnrorg  odd last" role="menuitem"><a href="http://www.asnr.org" data-hide-link-title="0" target="_blank" class="" data-icon-position="">American Society of Neuroradiology</a></li>
</ul></li>
<li class="menu-1746 menuparent  menu-path-front  even " role="menuitem"><a href="/" class="" data-icon-position="" data-hide-link-title="0">For Authors</a><ul role="menu"><li class="menu-1725 menu-path-sajnrorg-content-author-policies first odd " role="menuitem"><a href="https://www.ajnr.org/content/author-policies" data-hide-link-title="0" class="" data-icon-position="">Author Policies</a></li>
<li class="menu-1856 menu-path-sajnrorg-preprint-publishing  even " role="menuitem"><a href="https://www.ajnr.org/preprint_publishing" data-hide-link-title="0" class="" data-icon-position="">Preprint Publishing</a></li>
<li class="menu-1726 menu-path-sajnrorg-content-manuscript-submission-guidelines  odd last" role="menuitem"><a href="https://www.ajnr.org/content/manuscript-submission-guidelines" data-hide-link-title="0" class="" data-icon-position="">Manuscript Submission Guidelines</a></li>
</ul></li>
<li class="menu-862 menu-path-smcmanuscriptcentralcom-ajnr  odd " role="menuitem"><a href="https://mc.manuscriptcentral.com/ajnr" data-hide-link-title="0" target="_blank" class="" data-icon-position="">Submit a Manuscript</a></li>
<li class="menu-1184 menuparent  menu-path-node-7  even " role="menuitem"><a href="/content/about-us" data-hide-link-title="0" class="" data-icon-position="">Special Collections</a><ul role="menu"><li class="menu-1733 menu-path-ajnrorg-cc-csf-spinal-leak first odd " role="menuitem"><a href="http://www.ajnr.org/cc/CSF-Spinal-Leak" data-hide-link-title="0" class="" data-icon-position="">Spinal CSF Leak Articles (Jan 2020-June 2024)</a></li>
<li class="menu-1185 menu-path-ajnrorg-cc-most-impactful-ajnr-articles  even " role="menuitem"><a href="http://www.ajnr.org/cc/most-impactful-ajnr-articles" data-hide-link-title="0" class="" data-icon-position="">Most Impactful AJNR Articles</a></li>
<li class="menu-1896 menu-path-ajnrorg-cc-2024-awards  odd last" role="menuitem"><a href="http://www.ajnr.org/cc/2024-Awards" data-hide-link-title="0" class="" data-icon-position="">2024 AJNR Journal Awards</a></li>
</ul></li>
<li class="menu-788 menuparent  menu-path-node-9  odd last" role="menuitem"><a href="/content/advertising" class="" data-icon-position="" data-hide-link-title="0">More</a><ul role="menu"><li class="menu-780 menu-path-node-960 first odd " role="menuitem"><a href="/content/subscriber-help-and-services" data-hide-link-title="0" class="" data-icon-position="">Subscribers</a></li>
<li class="menu-863 menu-path-smarketplacecopyrightcom-rs-ui-web-mp-details-journal-122810747  even " role="menuitem"><a href="https://marketplace.copyright.com/rs-ui-web/mp/details/journal/122810747" data-hide-link-title="0" class="" data-icon-position="">Permissions</a></li>
<li class="menu-782 menu-path-node-937  odd " role="menuitem"><a href="/page/content/Ads" data-hide-link-title="0" class="" data-icon-position="">Advertisers</a></li>
<li class="menu-790 menu-path-alerts  even " role="menuitem"><a href="/alerts" data-hide-link-title="0" class="" data-icon-position="">Alerts</a></li>
<li class="menu-791 menu-path-node-10  odd last" role="menuitem"><a href="/feedback" class="" data-icon-position="" data-hide-link-title="0">Feedback</a></li>
</ul></li>
</ul></nav>
    </div>
  </div>
</div><div class="block block-menu text-right block-menu-social-media block-menu-menu-social-media even block-without-title" id="block-menu-menu-social-media">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <nav class="menubar-nav"><ul class="menu" role="menu"><li class="first leaf" role="menuitem"><a href="http://www.twitter.com/TheAJNR" target="_blank" class="link-icon-only link-icon"><span class="hw-icon-x-twitter"></span> <span class="title element-invisible">Follow AJNR on Twitter</span></a></li>
<li class="leaf" role="menuitem"><a href="http://www.facebook.com/AmJNeuroradiol" target="_blank" class="link-icon-only link-icon"><span class="icon-facebook-sign icon-2x"></span> <span class="title element-invisible">Visit AJNR on Facebook</span></a></li>
<li class="leaf" role="menuitem"><a href="https://www.instagram.com/the_ajnr/?hl=en" class="link-icon-only link-icon"><span class="icon-instagram icon-2x"></span> <span class="title element-invisible">Follow AJNR on Instagram</span></a></li>
<li class="leaf" role="menuitem"><a href="https://www.linkedin.com/company/american-journal-of-neuroradiology" class="link-icon-only link-icon"><span class="icon-linkedin icon-2x"></span> <span class="title element-invisible">Join AJNR on LinkedIn</span></a></li>
<li class="last leaf" role="menuitem"><a href="/rss" class="link-icon-only link-icon"><span class="icon-rss icon-2x"></span> <span class="title element-invisible">RSS Feeds</span></a></li>
</ul></nav>    </div>
  </div>
</div>  </div>
</div>
  </div>
  
  <div id="zone-header" class="zone zone-header clearfix container-30">
  	      <div id="messages" class="grid-28 prefix-1 suffix-1"><div role="alert" class="messages single-msg status highwire">
<div class="msg-col-left"><span class="icon icon-info-sign"></span></div><div class="msg-col-right">Getting new auth cookie, if you see this message a lot, tell someone!</div></div>
</div>
          </div>
</header>    
      <section id="section-content" class="section section-content">
    
  <div id="zone-content" class="zone zone-content clearfix container-30">    
        
    <div class="grid-28 suffix-1 prefix-1 region region-content" id="region-content">
  <div class="region-inner region-content-inner">
    <a id="main-content"></a>
                        <div class="block block-system block-main block-system-main odd block-without-title" id="block-system-main">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <div class="panel-display panels-960-layout jcore-2col-layout" >
	  <div class="panel-row-wrapper panel-row-first clearfix">
		
		<div class="top-wrapper">
			<div class="panel-panel panel-region-top">
			  <div class="inside"><div class="panel-pane pane-highwire-article-citation" >
  
      
  
  <div class="pane-content">
    <div class="highwire-article-citation highwire-citation-type-highwire-article node14468--5" data-node-nid="14468" id="top-node-14468--6763401634" data-pisa="ajnr;37/5/818" data-pisa-master="ajnr;ajnr.A4679" data-apath="/ajnr/37/5/818.atom" data-hw-author-tooltip-instance="highwire_author_tooltip"><div class="highwire-cite highwire-cite-highwire-article highwire-citation-jcore-article-title-complete clearfix has-author-tooltip highwire-citation-highwire-article-top-a">
  
  
      <div class="highwire-cite-overline"><span  class="highwire-cite-metadata-article-type highwire-cite-metadata">Research Article</span><span class="separator-pipe"></span><span  class="highwire-cite-metadata-art-cat highwire-cite-metadata"><span class="wrapper">ADULT BRAIN</span></span></div>
  
      <div class="highwire-cite-access"><span class="highwire-citation-access highwire-citation-access-check" data-pisa-id="ajnr;ajnr.A4679" data-atom-uri="/ajnr/37/5/818.atom" data-request-view="full"></span></div>
  
      <h1 class="highwire-cite-title" id="page-title">Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide</h1>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0">O. Sobczyk</span>, <span class="highwire-citation-author" data-delta="1">A.P. Crawley</span>, <span class="highwire-citation-author" data-delta="2">J. Poublanc</span>, <span class="highwire-citation-author" data-delta="3">K. Sam</span>, <span class="highwire-citation-author" data-delta="4">D.M. Mandell</span>, <span class="highwire-citation-author" data-delta="5">D.J. Mikulis</span>, <span class="highwire-citation-author" data-delta="6">J. Duffin</span> and <span class="highwire-citation-author" data-delta="7">J.A. Fisher</span></span></div>
  
    	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-journal highwire-cite-metadata">American Journal of Neuroradiology </span><span  class="highwire-cite-metadata-date highwire-cite-metadata">May 2016,  </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">37 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(5) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">818-824; </span><span  class="highwire-cite-metadata-doi highwire-cite-metadata">DOI: https://doi.org/10.3174/ajnr.A4679 </span></div>
  
  
  
</div>
<div id="hw-article-author-popups-top-node-14468--6763401634" style="display: none;"><div class="author-tooltip-0"><div class="author-tooltip-name">O. Sobczyk </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>a</span>From the Institute of Medical Science (O.S., D.J.M., J.A.F.)</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=O.%2BSobczyk%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Sobczyk%20O&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link"><a href="/search/author1%3AO.%2BSobczyk%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li><li class="author-orcid-link last"><a href="http://orcid.org/0000-0001-8983-1043" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for O. Sobczyk</a></li></ul></div><div class="author-tooltip-1"><div class="author-tooltip-name">A.P. Crawley </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>c</span>Joint Department of Medical Imaging and the Functional Neuroimaging Laboratory (A.P.C., J.P., K.S., D.M.M., D.J.M.)</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=A.P.%2BCrawley%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Crawley%20A&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link"><a href="/search/author1%3AA.P.%2BCrawley%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li><li class="author-orcid-link last"><a href="http://orcid.org/0000-0003-4578-7110" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for A.P. Crawley</a></li></ul></div><div class="author-tooltip-2"><div class="author-tooltip-name">J. Poublanc </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>c</span>Joint Department of Medical Imaging and the Functional Neuroimaging Laboratory (A.P.C., J.P., K.S., D.M.M., D.J.M.)</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=J.%2BPoublanc%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Poublanc%20J&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link"><a href="/search/author1%3AJ.%2BPoublanc%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li><li class="author-orcid-link last"><a href="http://orcid.org/0000-0001-8377-9846" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for J. Poublanc</a></li></ul></div><div class="author-tooltip-3"><div class="author-tooltip-name">K. Sam </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>b</span>Department of Physiology (K.S., J.D., J.A.F.), University of Toronto, Toronto, Canada</div><div class='author-affiliation'><span class='nlm-sup'>c</span>Joint Department of Medical Imaging and the Functional Neuroimaging Laboratory (A.P.C., J.P., K.S., D.M.M., D.J.M.)</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=K.%2BSam%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Sam%20K&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link"><a href="/search/author1%3AK.%2BSam%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li><li class="author-orcid-link last"><a href="http://orcid.org/0000-0002-1030-752X" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for K. Sam</a></li></ul></div><div class="author-tooltip-4"><div class="author-tooltip-name">D.M. Mandell </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>c</span>Joint Department of Medical Imaging and the Functional Neuroimaging Laboratory (A.P.C., J.P., K.S., D.M.M., D.J.M.)</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=D.M.%2BMandell%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Mandell%20D&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link"><a href="/search/author1%3AD.M.%2BMandell%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li><li class="author-orcid-link last"><a href="http://orcid.org/0000-0001-8007-4947" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for D.M. Mandell</a></li></ul></div><div class="author-tooltip-5"><div class="author-tooltip-name">D.J. Mikulis </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>a</span>From the Institute of Medical Science (O.S., D.J.M., J.A.F.)</div><div class='author-affiliation'><span class='nlm-sup'>c</span>Joint Department of Medical Imaging and the Functional Neuroimaging Laboratory (A.P.C., J.P., K.S., D.M.M., D.J.M.)</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=D.J.%2BMikulis%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Mikulis%20D&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link"><a href="/search/author1%3AD.J.%2BMikulis%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li><li class="author-orcid-link last"><a href="http://orcid.org/0000-0003-3956-0892" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for D.J. Mikulis</a></li></ul></div><div class="author-tooltip-6"><div class="author-tooltip-name">J. Duffin </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>b</span>Department of Physiology (K.S., J.D., J.A.F.), University of Toronto, Toronto, Canada</div><div class='author-affiliation'><span class='nlm-sup'>d</span>Department of Anaesthesia and Pain Management (J.D., J.A.F.), University Health Network, Toronto, Canada.</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=J.%2BDuffin%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Duffin%20J&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link"><a href="/search/author1%3AJ.%2BDuffin%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li><li class="author-orcid-link last"><a href="http://orcid.org/0000-0003-2270-7392" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for J. Duffin</a></li></ul></div><div class="author-tooltip-7"><div class="author-tooltip-name">J.A. Fisher </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>a</span>From the Institute of Medical Science (O.S., D.J.M., J.A.F.)</div><div class='author-affiliation'><span class='nlm-sup'>b</span>Department of Physiology (K.S., J.D., J.A.F.), University of Toronto, Toronto, Canada</div><div class='author-affiliation'><span class='nlm-sup'>d</span>Department of Anaesthesia and Pain Management (J.D., J.A.F.), University Health Network, Toronto, Canada.</div></span></div><ul class="author-tooltip-find-more"><li class="author-tooltip-gs-link first"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=author&amp;author%5B0%5D=J.A.%2BFisher%2B" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on Google Scholar</a></li><li class="author-tooltip-pubmed-link"><a href="/lookup/external-ref?access_num=Fisher%20J&amp;link_type=AUTHORSEARCH" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Find this author on PubMed</a></li><li class="author-site-search-link"><a href="/search/author1%3AJ.A.%2BFisher%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li><li class="author-orcid-link last"><a href="http://orcid.org/0000-0001-8911-3543" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for J.A. Fisher</a></li></ul></div></div></div>  </div>

  
  </div>
</div>
			</div>
		</div>
	
	</div> <!-- /.panel-row-wrapper -->	
	  
  <div class="panel-row-wrapper clearfix">
		
		<div class="main-content-wrapper grid-17 suffix-1 alpha">
			<div class="panel-panel panel-region-content">
			  <div class="inside"><div class="panel-pane pane-highwire-panel-tabs pane-panels-ajax-tab-tabs" >
  
      
  
  <div class="pane-content">
    <div class="item-list"><ul class="tabs inline panels-ajax-tab"><li class="first"><a href="/content/37/5/818" class="panels-ajax-tab-tab" data-panel-name="jnl_ajnr_tab_art" data-target-id="highwire_article_tabs" data-entity-context="node:14468" data-trigger="" data-url-enabled="1">Article</a><a href="/panels_ajax_tab/jnl_ajnr_tab_art/node:14468/1" rel="nofollow" style="display:none" class="js-crawler-link"></a></li><li><a href="/content/37/5/818/tab-figures-data" class="panels-ajax-tab-tab" data-panel-name="jnl_ajnr_tab_data" data-target-id="highwire_article_tabs" data-entity-context="node:14468" data-trigger="tab-figures-data" data-url-enabled="1">Figures &amp; Data</a><a href="/panels_ajax_tab/jnl_ajnr_tab_data/node:14468/1" rel="nofollow" style="display:none" class="js-crawler-link"></a></li><li><a href="/content/37/5/818/tab-supplemental" class="panels-ajax-tab-tab" data-panel-name="jnl_ajnr_tab_supp" data-target-id="highwire_article_tabs" data-entity-context="node:14468" data-trigger="tab-supplemental" data-url-enabled="1">Supplemental</a><a href="/panels_ajax_tab/jnl_ajnr_tab_supp/node:14468/1" rel="nofollow" style="display:none" class="js-crawler-link"></a></li><li><a href="/content/37/5/818/tab-references" class="panels-ajax-tab-tab" data-panel-name="jnl_ajnr_tab_refs" data-target-id="highwire_article_tabs" data-entity-context="node:14468" data-trigger="tab-references" data-url-enabled="1">References</a><a href="/panels_ajax_tab/jnl_ajnr_tab_refs/node:14468/1" rel="nofollow" style="display:none" class="js-crawler-link"></a></li><li><a href="/content/37/5/818/tab-article-info" class="panels-ajax-tab-tab" data-panel-name="jnl_ajnr_tab_info" data-target-id="highwire_article_tabs" data-entity-context="node:14468" data-trigger="tab-article-info" data-url-enabled="1">Info &amp; Metrics</a><a href="/panels_ajax_tab/jnl_ajnr_tab_info/node:14468/1" rel="nofollow" style="display:none" class="js-crawler-link"></a></li><li class="last"><a href="/content/ajnr/37/5/818.full.pdf" class="panels-ajax-tab-tab" data-panel-name="jnl_ajnr_tab_pdf" data-target-id="highwire_article_tabs" data-entity-context="node:14468" data-trigger="tab-pdf" data-url-enabled="1"><i class="icon-file-alt"></i> PDF</a><a href="/panels_ajax_tab/jnl_ajnr_tab_pdf/node:14468/1" rel="nofollow" style="display:none" class="js-crawler-link"></a></li></ul></div>  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-highwire-panel-tabs-container" >
  
      
  
  <div class="pane-content">
    <div data-panels-ajax-tab-preloaded="jnl_ajnr_tab_refs" id="panels-ajax-tab-container-highwire_article_tabs" class="panels-ajax-tab-container"><div class="panels-ajax-tab-loading" style ="display:none"><img class="loading" src="http://ajnr-stage2.stage.highwire.org/sites/all/modules/contrib/panels_ajax_tab/images/loading.gif" alt="Loading" title="Loading" /></div><div class="panels-ajax-tab-wrap-jnl_ajnr_tab_refs"><div class="panel-display panel-1col clearfix" >
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-highwire-markup" >
  
      
  
  <div class="pane-content">
    <div class="highwire-markup"><div xmlns="http://www.w3.org/1999/xhtml" xmlns:xhtml="http://www.w3.org/1999/xhtml" class="section ref-list" id="ref-list-1"><h2 class="">References</h2><ol class="cit-list ref-use-labels"><li><span class="ref-label">1.</span><a class="rev-xref-ref" href="#xref-ref-1-1" title="View reference 1. in text" id="ref-1">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.1" data-doi="10.1093/brain/124.3.457"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Markus</span>  <span class="cit-name-given-names">H</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Cullinane</span>  <span class="cit-name-given-names">M</span></span></li></ol><cite>. <span class="cit-article-title">Severely impaired cerebrovascular reactivity predicts stroke and TIA risk in patients with carotid artery stenosis and occlusion</span>. <abbr class="cit-jnl-abbrev">Brain</abbr> <span class="cit-pub-date">2001</span>;<span class="cit-vol">124</span>:<span class="cit-fpage">457</span>–<span class="cit-lpage">67</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1093/brain/124.3.457</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>11222446</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NToiYnJhaW4iO3M6NToicmVzaWQiO3M6OToiMTI0LzMvNDU3IjtzOjQ6ImF0b20iO3M6MTk6Ii9ham5yLzM3LzUvODE4LmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">2.</span><a class="rev-xref-ref" href="#xref-ref-2-1" title="View reference 2. in text" id="ref-2">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.2" data-doi="10.1161/01.STR.0000019511.81583.A8"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Ogasawara</span>  <span class="cit-name-given-names">K</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Ogawa</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Yoshimoto</span>  <span class="cit-name-given-names">T</span></span></li></ol><cite>. <span class="cit-article-title">Cerebrovascular reactivity to acetazolamide and outcome in patients with symptomatic internal carotid or middle cerebral artery occlusion: a xenon-133 single-photon emission computed tomography study</span>. <abbr class="cit-jnl-abbrev">Stroke</abbr> <span class="cit-pub-date">2002</span>;<span class="cit-vol">33</span>:<span class="cit-fpage">1857</span>–<span class="cit-lpage">62</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1161/01.STR.0000019511.81583.A8</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>12105366</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6OToic3Ryb2tlYWhhIjtzOjU6InJlc2lkIjtzOjk6IjMzLzcvMTg1NyI7czo0OiJhdG9tIjtzOjE5OiIvYWpuci8zNy81LzgxOC5hdG9tIjt9czo4OiJmcmFnbWVudCI7czowOiIiO30=" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">3.</span><a class="rev-xref-ref" href="#xref-ref-3-1" title="View reference 3. in text" id="ref-3">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.3" data-doi="10.1016/S0090-3019(03)00152-6"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Sasoh</span>  <span class="cit-name-given-names">M</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Ogasawara</span>  <span class="cit-name-given-names">K</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Kuroda</span>  <span class="cit-name-given-names">K</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Effects of EC-IC bypass surgery on cognitive impairment in patients with hemodynamic cerebral ischemia</span>. <abbr class="cit-jnl-abbrev">Surg Neurol</abbr> <span class="cit-pub-date">2003</span>;<span class="cit-vol">59</span>:<span class="cit-fpage">455</span>–<span class="cit-lpage">60</span>; <span class="cit-comment">discussion 460–63</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1016/S0090-3019(03)00152-6</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>12826338</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1016/S0090-3019(03)00152-6&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=12826338&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000183841900006&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">4.</span><a class="rev-xref-ref" href="#xref-ref-4-1" title="View reference 4. in text" id="ref-4">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.4" data-doi="10.3233/JAD-2011-101968"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Silvestrini</span>  <span class="cit-name-given-names">M</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Viticchi</span>  <span class="cit-name-given-names">G</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Falsetti</span>  <span class="cit-name-given-names">L</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">The role of carotid atherosclerosis in Alzheimer's disease progression</span>. <abbr class="cit-jnl-abbrev">J Alzheimers Dis</abbr> <span class="cit-pub-date">2011</span>;<span class="cit-vol">25</span>:<span class="cit-fpage">719</span>–<span class="cit-lpage">26</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.3233/JAD-2011-101968</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>21508532</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.3233/JAD-2011-101968&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=21508532&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">5.</span><a class="rev-xref-ref" href="#xref-ref-5-1" title="View reference 5. in text" id="ref-5">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.5" data-doi="10.1038/ncpneuro0918"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Han</span>  <span class="cit-name-given-names">JS</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Mandell</span>  <span class="cit-name-given-names">DM</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Poublanc</span>  <span class="cit-name-given-names">J</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">BOLD-MRI cerebrovascular reactivity findings in cocaine-induced cerebral vasculitis</span>. <abbr class="cit-jnl-abbrev">Nat Clin Pract Neurol</abbr> <span class="cit-pub-date">2008</span>;<span class="cit-vol">4</span>:<span class="cit-fpage">628</span>–<span class="cit-lpage">32</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1038/ncpneuro0918</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>18839005</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1038/ncpneuro0918&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=18839005&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000260591700012&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">6.</span><a class="rev-xref-ref" href="#xref-ref-6-1" title="View reference 6. in text" id="ref-6">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.6" data-doi="10.1136/jnnp.2009.188078"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Fierstra</span>  <span class="cit-name-given-names">J</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Poublanc</span>  <span class="cit-name-given-names">J</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Han</span>  <span class="cit-name-given-names">JS</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Steal physiology is spatially associated with cortical thinning</span>. <abbr class="cit-jnl-abbrev">J Neurol Neurosurg Psychiatry</abbr> <span class="cit-pub-date">2010</span>;<span class="cit-vol">81</span>:<span class="cit-fpage">290</span>–<span class="cit-lpage">93</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1136/jnnp.2009.188078</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>20185465</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiam5ucCI7czo1OiJyZXNpZCI7czo4OiI4MS8zLzI5MCI7czo0OiJhdG9tIjtzOjE5OiIvYWpuci8zNy81LzgxOC5hdG9tIjt9czo4OiJmcmFnbWVudCI7czowOiIiO30=" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">7.</span><a class="rev-xref-ref" href="#xref-ref-7-1" title="View reference 7. in text" id="ref-7">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.7" data-doi="10.3174/ajnr.A2365"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Mandell</span>  <span class="cit-name-given-names">DM</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Han</span>  <span class="cit-name-given-names">JS</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Poublanc</span>  <span class="cit-name-given-names">J</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Quantitative measurement of cerebrovascular reactivity by blood oxygen level-dependent MR imaging in patients with intracranial stenosis: preoperative cerebrovascular reactivity predicts the effect of extracranial-intracranial bypass surgery</span>. <abbr class="cit-jnl-abbrev">AJNR Am J Neuroradiol</abbr> <span class="cit-pub-date">2011</span>;<span class="cit-vol">32</span>:<span class="cit-fpage">721</span>–<span class="cit-lpage">27</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.3174/ajnr.A2365</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>21436343</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czo4OiIzMi80LzcyMSI7czo0OiJhdG9tIjtzOjE5OiIvYWpuci8zNy81LzgxOC5hdG9tIjt9czo4OiJmcmFnbWVudCI7czowOiIiO30=" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">8.</span><a class="rev-xref-ref" href="#xref-ref-8-1" title="View reference 8. in text" id="ref-8">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.8" data-doi="10.1016/j.neuroimage.2014.01.051"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Sobczyk</span>  <span class="cit-name-given-names">O</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Battisti-Charbonney</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Fierstra</span>  <span class="cit-name-given-names">J</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">A conceptual model for CO<sub>2</sub>-induced redistribution of cerebral blood flow with experimental confirmation using BOLD MRI</span>. <abbr class="cit-jnl-abbrev">Neuroimage</abbr> <span class="cit-pub-date">2014</span>;<span class="cit-vol">92</span>:<span class="cit-fpage">56</span>–<span class="cit-lpage">68</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1016/j.neuroimage.2014.01.051</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>24508647</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1016/j.neuroimage.2014.01.051&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=24508647&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">9.</span><a class="rev-xref-ref" href="#xref-ref-9-1" title="View reference 9. in text" id="ref-9">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.9" data-doi="10.1016/j.neuroimage.2015.04.029"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Duffin</span>  <span class="cit-name-given-names">J</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Sobczyk</span>  <span class="cit-name-given-names">O</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Crawley</span>  <span class="cit-name-given-names">AP</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">The dynamics of cerebrovascular reactivity shown with transfer function analysis</span>. <abbr class="cit-jnl-abbrev">Neuroimage</abbr> <span class="cit-pub-date">2015</span>;<span class="cit-vol">114</span>:<span class="cit-fpage">207</span>–<span class="cit-lpage">16</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1016/j.neuroimage.2015.04.029</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>25891374</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1016/j.neuroimage.2015.04.029&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=25891374&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">10.</span><a class="rev-xref-ref" href="#xref-ref-10-1" title="View reference 10. in text" id="ref-10">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.10" data-doi="10.1038/jcbfm.2015.114"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Poublanc</span>  <span class="cit-name-given-names">J</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Crawley</span>  <span class="cit-name-given-names">AP</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Sobczyk</span>  <span class="cit-name-given-names">O</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Measuring cerebrovascular reactivity: the dynamic response to a step hypercapnic stimulus</span>. <abbr class="cit-jnl-abbrev">J Cereb Blood Flow Metab</abbr> <span class="cit-pub-date">2015</span>;<span class="cit-vol">35</span>:<span class="cit-fpage">1746</span>–<span class="cit-lpage">56</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1038/jcbfm.2015.114</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>26126862</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NToic3BqY2IiO3M6NToicmVzaWQiO3M6MTA6IjM1LzExLzE3NDYiO3M6NDoiYXRvbSI7czoxOToiL2FqbnIvMzcvNS84MTguYXRvbSI7fXM6ODoiZnJhZ21lbnQiO3M6MDoiIjt9" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">11.</span><a class="rev-xref-ref" href="#xref-ref-11-1" title="View reference 11. in text" id="ref-11">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.11" data-doi="10.1183/09031936.98.12030698"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Sommer</span>  <span class="cit-name-given-names">LZ</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Iscoe</span>  <span class="cit-name-given-names">S</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Robicsek</span>  <span class="cit-name-given-names">A</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">A simple breathing circuit minimizing changes in alveolar ventilation during hyperpnoea</span>. <abbr class="cit-jnl-abbrev">Eur Respir J</abbr> <span class="cit-pub-date">1998</span>;<span class="cit-vol">12</span>:<span class="cit-fpage">698</span>–<span class="cit-lpage">701</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1183/09031936.98.12030698</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>9762802</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6MzoiZXJqIjtzOjU6InJlc2lkIjtzOjg6IjEyLzMvNjk4IjtzOjQ6ImF0b20iO3M6MTk6Ii9ham5yLzM3LzUvODE4LmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span></span></a></div></div></li><li><span class="ref-label">12.</span><a class="rev-xref-ref" href="#xref-ref-12-1" title="View reference 12. in text" id="ref-12">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.12" data-doi="10.1113/jphysiol.2007.129395"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Slessarev</span>  <span class="cit-name-given-names">M</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Han</span>  <span class="cit-name-given-names">J</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Mardimae</span>  <span class="cit-name-given-names">A</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Prospective targeting and control of end-tidal CO2 and O2 concentrations</span>. <abbr class="cit-jnl-abbrev">J Physiol</abbr> <span class="cit-pub-date">2007</span>;<span class="cit-vol">581</span>:<span class="cit-fpage">1207</span>–<span class="cit-lpage">19</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1113/jphysiol.2007.129395</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>17446225</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1113/jphysiol.2007.129395&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=17446225&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000247174700029&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">13.</span><a class="rev-xref-ref" href="#xref-ref-13-1" title="View reference 13. in text" id="ref-13">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.13" data-doi="10.1006/cbmr.1996.0014"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Cox</span>  <span class="cit-name-given-names">RW</span></span></li></ol><cite>. <span class="cit-article-title">AFNI: software for analysis and visualization of functional magnetic resonance neuroimages</span>. <abbr class="cit-jnl-abbrev">Comput Biomed Res</abbr> <span class="cit-pub-date">1996</span>;<span class="cit-vol">29</span>:<span class="cit-fpage">162</span>–<span class="cit-lpage">73</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1006/cbmr.1996.0014</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>8812068</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1006/cbmr.1996.0014&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=8812068&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=A1996UV56700002&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">14.</span><a class="rev-xref-ref" href="#xref-ref-14-1" title="View reference 14. in text" id="ref-14">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.14" data-doi="10.1016/j.neuroimage.2008.09.037"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Saad</span>  <span class="cit-name-given-names">ZS</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Glen</span>  <span class="cit-name-given-names">DR</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Chen</span>  <span class="cit-name-given-names">G</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">A new method for improving functional-to-structural MRI alignment using local Pearson correlation</span>. <abbr class="cit-jnl-abbrev">Neuroimage</abbr> <span class="cit-pub-date">2009</span>;<span class="cit-vol">44</span>:<span class="cit-fpage">839</span>–<span class="cit-lpage">48</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1016/j.neuroimage.2008.09.037</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>18976717</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1016/j.neuroimage.2008.09.037&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=18976717&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000262301500024&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">15.</span><a class="rev-xref-ref" href="#xref-ref-15-1" title="View reference 15. in text" id="ref-15">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.15" data-doi="10.1006/nimg.1997.0290"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Ashburner</span>  <span class="cit-name-given-names">J</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Friston</span>  <span class="cit-name-given-names">K</span></span></li></ol><cite>. <span class="cit-article-title">Multimodal image coregistration and partitioning: a unified framework</span>. <abbr class="cit-jnl-abbrev">Neuroimage</abbr> <span class="cit-pub-date">1997</span>;<span class="cit-vol">6</span>:<span class="cit-fpage">209</span>–<span class="cit-lpage">17</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1006/nimg.1997.0290</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>9344825</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1006/nimg.1997.0290&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=9344825&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=A1997YE48400007&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">16.</span><a class="rev-xref-ref" href="#xref-ref-16-1" title="View reference 16. in text" id="ref-16">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.16" data-doi="10.1002/(SICI)1097-0193(1999)7:4&lt;254::AID-HBM4&gt;3.0.CO;2-G"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Ashburner</span>  <span class="cit-name-given-names">J</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Friston</span>  <span class="cit-name-given-names">KJ</span></span></li></ol><cite>. <span class="cit-article-title">Nonlinear spatial normalization using basis functions</span>. <abbr class="cit-jnl-abbrev">Hum Brain Mapp</abbr> <span class="cit-pub-date">1999</span>;<span class="cit-vol">7</span>:<span class="cit-fpage">254</span>–<span class="cit-lpage">66</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>10408769</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1002/(SICI)1097-0193(1999)7:4&lt;254::AID-HBM4&gt;3.0.CO;2-G&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=10408769&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000080703900004&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">17.</span><a class="rev-xref-ref" href="#xref-ref-17-1" title="View reference 17. in text" id="ref-17">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.17" data-doi="10.1002/jmri.22044"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Kassner</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Winter</span>  <span class="cit-name-given-names">JD</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Poublanc</span>  <span class="cit-name-given-names">J</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Blood-oxygen level dependent MRI measures of cerebrovascular reactivity using a controlled respiratory challenge: reproducibility and gender differences</span>. <abbr class="cit-jnl-abbrev">J Magn Reson Imaging</abbr> <span class="cit-pub-date">2010</span>;<span class="cit-vol">31</span>:<span class="cit-fpage">298</span>–<span class="cit-lpage">304</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1002/jmri.22044</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>20099341</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1002/jmri.22044&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=20099341&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000274117200004&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">18.</span><a class="rev-xref-ref" href="#xref-ref-18-1" title="View reference 18. in text" id="ref-18">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.18" data-doi="10.1002/mrm.22405"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Mark</span>  <span class="cit-name-given-names">CI</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Slessarev</span>  <span class="cit-name-given-names">M</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Ito</span>  <span class="cit-name-given-names">S</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Precise control of end-tidal carbon dioxide and oxygen improves BOLD and ASL cerebrovascular reactivity measures</span>. <abbr class="cit-jnl-abbrev">Magn Reson Med</abbr> <span class="cit-pub-date">2010</span>;<span class="cit-vol">64</span>:<span class="cit-fpage">749</span>–<span class="cit-lpage">56</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1002/mrm.22405</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>20648687</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1002/mrm.22405&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=20648687&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">19.</span><a class="rev-xref-ref" href="#xref-ref-19-1" title="View reference 19. in text" id="ref-19">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.19" data-doi="10.1113/jphysiol.2013.259150"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Fierstra</span>  <span class="cit-name-given-names">J</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Sobczyk</span>  <span class="cit-name-given-names">O</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Battisti-Charbonney</span>  <span class="cit-name-given-names">A</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Measuring cerebrovascular reactivity: what stimulus to use?</span> <abbr class="cit-jnl-abbrev">J Physiol</abbr> <span class="cit-pub-date">2013</span>;<span class="cit-vol">591</span>:<span class="cit-fpage">5809</span>–<span class="cit-lpage">21</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1113/jphysiol.2013.259150</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>24081155</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1113/jphysiol.2013.259150&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=24081155&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">20.</span><a class="rev-xref-ref" href="#xref-ref-20-1" title="View reference 20. in text" id="ref-20">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.20" data-doi="10.1038/jcbfm.2013.48"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Tancredi</span>  <span class="cit-name-given-names">FB</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Hoge</span>  <span class="cit-name-given-names">RD</span></span></li></ol><cite>. <span class="cit-article-title">Comparison of cerebral vascular reactivity measures obtained using breath-holding and CO2 inhalation</span>. <abbr class="cit-jnl-abbrev">J Cereb Blood Flow Metab</abbr> <span class="cit-pub-date">2013</span>;<span class="cit-vol">33</span>:<span class="cit-fpage">1066</span>–<span class="cit-lpage">74</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1038/jcbfm.2013.48</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>23571282</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NToic3BqY2IiO3M6NToicmVzaWQiO3M6OToiMzMvNy8xMDY2IjtzOjQ6ImF0b20iO3M6MTk6Ii9ham5yLzM3LzUvODE4LmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">21.</span><a class="rev-xref-ref" href="#xref-ref-21-1" title="View reference 21. in text" id="ref-21">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.21" data-doi="10.1172/JCI101995"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Kety</span>  <span class="cit-name-given-names">SS</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Schmidt</span>  <span class="cit-name-given-names">CF</span></span></li></ol><cite>. <span class="cit-article-title">The effects of altered arterial tension of carbon dioxide and oxygen on cerebral blood flow and cerebral oxygen consumption of normal young men</span>. <abbr class="cit-jnl-abbrev">J Clin Invest</abbr> <span class="cit-pub-date">1948</span>;<span class="cit-vol">27</span>:<span class="cit-fpage">484</span>–<span class="cit-lpage">92</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1172/JCI101995</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>16695569</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1172/JCI101995&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=16695569&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=A1948UG36800015&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">22.</span><a class="rev-xref-ref" href="#xref-ref-22-1" title="View reference 22. in text" id="ref-22">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.22" data-doi="10.1161/01.STR.23.5.668"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Markus</span>  <span class="cit-name-given-names">HS</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Harrison</span>  <span class="cit-name-given-names">MJ</span></span></li></ol><cite>. <span class="cit-article-title">Estimation of cerebrovascular reactivity using transcranial Doppler, including the use of breath-holding as the vasodilatory stimulus</span>. <abbr class="cit-jnl-abbrev">Stroke</abbr> <span class="cit-pub-date">1992</span>;<span class="cit-vol">23</span>:<span class="cit-fpage">668</span>–<span class="cit-lpage">73</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1161/01.STR.23.5.668</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>1579964</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6OToic3Ryb2tlYWhhIjtzOjU6InJlc2lkIjtzOjg6IjIzLzUvNjY4IjtzOjQ6ImF0b20iO3M6MTk6Ii9ham5yLzM3LzUvODE4LmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">23.</span><a class="rev-xref-ref" href="#xref-ref-23-1" title="View reference 23. in text" id="ref-23">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.23" data-doi="10.1007/s00234-004-1274-3"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">van der Zande</span>  <span class="cit-name-given-names">FH</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Hofman</span>  <span class="cit-name-given-names">PA</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Backes</span>  <span class="cit-name-given-names">WH</span></span></li></ol><cite>. <span class="cit-article-title">Mapping hypercapnia-induced cerebrovascular reactivity using BOLD MRI</span>. <abbr class="cit-jnl-abbrev">Neuroradiology</abbr> <span class="cit-pub-date">2005</span>;<span class="cit-vol">47</span>:<span class="cit-fpage">114</span>–<span class="cit-lpage">20</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1007/s00234-004-1274-3</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>15616848</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1007/s00234-004-1274-3&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=15616848&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000227567500005&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">24.</span><a class="rev-xref-ref" href="#xref-ref-24-1" title="View reference 24. in text" id="ref-24">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.24" data-doi="10.1111/j.1600-0404.1999.tb07342.x"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Silvestrini</span>  <span class="cit-name-given-names">M</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Vernieri</span>  <span class="cit-name-given-names">F</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Troisi</span>  <span class="cit-name-given-names">E</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Cerebrovascular reactivity in carotid artery occlusion: possible implications for surgical management of selected groups of patients</span>. <abbr class="cit-jnl-abbrev">Acta Neurol Scand</abbr> <span class="cit-pub-date">1999</span>;<span class="cit-vol">99</span>:<span class="cit-fpage">187</span>–<span class="cit-lpage">91</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1111/j.1600-0404.1999.tb07342.x</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>10100963</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1111/j.1600-0404.1999.tb07342.x&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=10100963&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000078945800009&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">25.</span><a class="rev-xref-ref" href="#xref-ref-25-1" title="View reference 25. in text" id="ref-25">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.25" data-doi="10.1080/09553000701370894"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Prisman</span>  <span class="cit-name-given-names">E</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Slessarev</span>  <span class="cit-name-given-names">M</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Azami</span>  <span class="cit-name-given-names">T</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Modified oxygen mask to induce target levels of hyperoxia and hypercarbia during radiotherapy: a more effective alternative to carbogen</span>. <abbr class="cit-jnl-abbrev">Int J Radiat Biol</abbr> <span class="cit-pub-date">2007</span>;<span class="cit-vol">83</span>:<span class="cit-fpage">457</span>–<span class="cit-lpage">62</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1080/09553000701370894</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>17538795</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1080/09553000701370894&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=17538795&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000247469700003&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">26.</span><a class="rev-xref-ref" href="#xref-ref-26-1" title="View reference 26. in text" id="ref-26">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.26" data-doi="10.1113/jphysiol.2008.154716"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Ito</span>  <span class="cit-name-given-names">S</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Mardimae</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Han</span>  <span class="cit-name-given-names">J</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Non-invasive prospective targeting of arterial P(CO2) in subjects at rest</span>. <abbr class="cit-jnl-abbrev">J Physiol</abbr> <span class="cit-pub-date">2008</span>;<span class="cit-vol">586</span>:<span class="cit-fpage">3675</span>–<span class="cit-lpage">82</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1113/jphysiol.2008.154716</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>18565992</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1113/jphysiol.2008.154716&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=18565992&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a><a href="/lookup/external-ref?access_num=000258100500010&amp;link_type=ISI" class="cit-ref-sprinkles cit-ref-sprinkles-newisilink cit-ref-sprinkles-webofscience"><span>Web of Science</span></a></div></div></li><li><span class="ref-label">27.</span><a class="rev-xref-ref" href="#xref-ref-27-1" title="View reference 27. in text" id="ref-27">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.27" data-doi="10.1038/jcbfm.2014.184"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Sobczyk</span>  <span class="cit-name-given-names">O</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Battisti-Charbonney</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Poublanc</span>  <span class="cit-name-given-names">J</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Assessing cerebrovascular reactivity abnormality by comparison to a reference atlas</span>. <abbr class="cit-jnl-abbrev">J Cereb Blood Flow Metab</abbr> <span class="cit-pub-date">2015</span>;<span class="cit-vol">35</span>:<span class="cit-fpage">213</span>–<span class="cit-lpage">20</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1038/jcbfm.2014.184</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>25388679</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NToic3BqY2IiO3M6NToicmVzaWQiO3M6ODoiMzUvMi8yMTMiO3M6NDoiYXRvbSI7czoxOToiL2FqbnIvMzcvNS84MTguYXRvbSI7fXM6ODoiZnJhZ21lbnQiO3M6MDoiIjt9" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">28.</span><a class="rev-xref-ref" href="#xref-ref-28-1" title="View reference 28. in text" id="ref-28">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.28" data-doi="10.1007/s00234-015-1571-z"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Grade</span>  <span class="cit-name-given-names">M</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Hernandez Tamames</span>  <span class="cit-name-given-names">JA</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Pizzini</span>  <span class="cit-name-given-names">FB</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">A neuroradiologist's guide to arterial spin labeling MRI in clinical practice</span>. <abbr class="cit-jnl-abbrev">Neuroradiology</abbr> <span class="cit-pub-date">2015</span>;<span class="cit-vol">57</span>:<span class="cit-fpage">1181</span>–<span class="cit-lpage">202</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1007/s00234-015-1571-z</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>26351201</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1007/s00234-015-1571-z&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=26351201&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">29.</span><a class="rev-xref-ref" href="#xref-ref-29-1" title="View reference 29. in text" id="ref-29">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.29" data-doi="10.1161/STROKEAHA.107.506709"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Mandell</span>  <span class="cit-name-given-names">DM</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Han</span>  <span class="cit-name-given-names">JS</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Poublanc</span>  <span class="cit-name-given-names">J</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Mapping cerebrovascular reactivity using blood oxygen level-dependent MRI in patients with arterial steno-occlusive disease: comparison with arterial spin labeling MRI</span>. <abbr class="cit-jnl-abbrev">Stroke</abbr> <span class="cit-pub-date">2008</span>;<span class="cit-vol">39</span>:<span class="cit-fpage">2021</span>–<span class="cit-lpage">28</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1161/STROKEAHA.107.506709</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>18451352</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6OToic3Ryb2tlYWhhIjtzOjU6InJlc2lkIjtzOjk6IjM5LzcvMjAyMSI7czo0OiJhdG9tIjtzOjE5OiIvYWpuci8zNy81LzgxOC5hdG9tIjt9czo4OiJmcmFnbWVudCI7czowOiIiO30=" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">30.</span><a class="rev-xref-ref" href="#xref-ref-30-1" title="View reference 30. in text" id="ref-30">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.30" data-doi="10.1002/jmri.24878"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Tancredi</span>  <span class="cit-name-given-names">FB</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Lajoie</span>  <span class="cit-name-given-names">I</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Hoge</span>  <span class="cit-name-given-names">RD</span></span></li></ol><cite>. <span class="cit-article-title">Test-retest reliability of cerebral blood flow and blood oxygenation level-dependent responses to hypercapnia and hyperoxia using dual-echo pseudo-continuous arterial spin labeling and step changes in the fractional composition of inspired gases</span>. <abbr class="cit-jnl-abbrev">J Magn Reson Imaging</abbr> <span class="cit-pub-date">2015</span>;<span class="cit-vol">42</span>:<span class="cit-fpage">1144</span>–<span class="cit-lpage">57</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1002/jmri.24878</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>25752936</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1002/jmri.24878&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=25752936&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">31.</span><a class="rev-xref-ref" href="#xref-ref-31-1" title="View reference 31. in text" id="ref-31">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.31" data-doi="10.1073/pnas.95.4.1834"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Davis</span>  <span class="cit-name-given-names">TL</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Kwong</span>  <span class="cit-name-given-names">KK</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Weisskoff</span>  <span class="cit-name-given-names">RM</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Calibrated functional MRI: mapping the dynamics of oxidative metabolism</span>. <abbr class="cit-jnl-abbrev">Proc Natl Acad Sci U S A</abbr> <span class="cit-pub-date">1998</span>;<span class="cit-vol">95</span>:<span class="cit-fpage">1834</span>–<span class="cit-lpage">39</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1073/pnas.95.4.1834</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>9465103</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoicG5hcyI7czo1OiJyZXNpZCI7czo5OiI5NS80LzE4MzQiO3M6NDoiYXRvbSI7czoxOToiL2FqbnIvMzcvNS84MTguYXRvbSI7fXM6ODoiZnJhZ21lbnQiO3M6MDoiIjt9" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">32.</span><a class="rev-xref-ref" href="#xref-ref-32-1" title="View reference 32. in text" id="ref-32">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.32" data-doi="10.1002/(SICI)1522-2594(199911)42:5&lt;849::AID-MRM4&gt;3.0.CO;2-Z"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Hoge</span>  <span class="cit-name-given-names">RD</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Atkinson</span>  <span class="cit-name-given-names">J</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Gill</span>  <span class="cit-name-given-names">B</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Investigation of BOLD signal dependence on cerebral blood flow and oxygen consumption: the deoxyhemoglobin dilution model</span>. <abbr class="cit-jnl-abbrev">Magn ResonMed</abbr> <span class="cit-pub-date">1999</span>;<span class="cit-vol">42</span>:<span class="cit-fpage">849</span>–<span class="cit-lpage">63</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>10542343</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1002/(SICI)1522-2594(199911)42:5&lt;849::AID-MRM4&gt;3.0.CO;2-Z&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=10542343&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">33.</span><a class="rev-xref-ref" href="#xref-ref-33-1" title="View reference 33. in text" id="ref-33">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.33" data-doi="10.1161/01.STR.28.12.2353"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Kastrup</span>  <span class="cit-name-given-names">A</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Thomas</span>  <span class="cit-name-given-names">C</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Hartmann</span>  <span class="cit-name-given-names">C</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Sex dependency of cerebrovascular CO2 reactivity in normal subjects</span>. <abbr class="cit-jnl-abbrev">Stroke</abbr> <span class="cit-pub-date">1997</span>;<span class="cit-vol">28</span>:<span class="cit-fpage">2353</span>–<span class="cit-lpage">56</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1161/01.STR.28.12.2353</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>9412613</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6OToic3Ryb2tlYWhhIjtzOjU6InJlc2lkIjtzOjEwOiIyOC8xMi8yMzUzIjtzOjQ6ImF0b20iO3M6MTk6Ii9ham5yLzM3LzUvODE4LmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==" class="cit-ref-sprinkles cit-ref-sprinkles-ijlink"><span><span class="cit-reflinks-abstract">Abstract</span><span class="cit-sep cit-reflinks-variant-name-sep">/</span><span class="cit-reflinks-full-text"><span class="free-full-text">FREE </span>Full Text</span></span></a></div></div></li><li><span class="ref-label">34.</span><a class="rev-xref-ref" href="#xref-ref-34-1" title="View reference 34. in text" id="ref-34">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.34" data-doi="10.3389/fphys.2014.00049"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Flück</span>  <span class="cit-name-given-names">D</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Beaudin</span>  <span class="cit-name-given-names">AE</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Steinback</span>  <span class="cit-name-given-names">CD</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Effects of aging on the association between cerebrovascular responses to visual stimulation, hypercapnia and arterial stiffness</span>. <abbr class="cit-jnl-abbrev">Front Physiol</abbr> <span class="cit-pub-date">2014</span>;<span class="cit-vol">5</span>:<span class="cit-fpage">49</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.3389/fphys.2014.00049</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>24600398</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.3389/fphys.2014.00049&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=24600398&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">35.</span><a class="rev-xref-ref" href="#xref-ref-35-1" title="View reference 35. in text" id="ref-35">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.35" data-doi="10.1002/jmri.24786"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Mark</span>  <span class="cit-name-given-names">CI</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Mazerolle</span>  <span class="cit-name-given-names">EL</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Chen</span>  <span class="cit-name-given-names">JJ</span></span></li></ol><cite>. <span class="cit-article-title">Metabolic and vascular origins of the BOLD effect: implications for imaging pathology and resting-state brain function</span>. <abbr class="cit-jnl-abbrev">J Magn Reson Imaging</abbr> <span class="cit-pub-date">2015</span>;<span class="cit-vol">42</span>:<span class="cit-fpage">231</span>–<span class="cit-lpage">46</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1002/jmri.24786</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>25727523</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1002/jmri.24786&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=25727523&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">36.</span><a class="rev-xref-ref" href="#xref-ref-36-1" title="View reference 36. in text" id="ref-36">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.36" data-doi="10.1016/j.jns.2006.06.009"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Schwertfeger</span>  <span class="cit-name-given-names">N</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Neu</span>  <span class="cit-name-given-names">P</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Schlattmann</span>  <span class="cit-name-given-names">P</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Cerebrovascular reactivity over time course in healthy subjects</span>. <abbr class="cit-jnl-abbrev">J Neurol Sci</abbr> <span class="cit-pub-date">2006</span>;<span class="cit-vol">249</span>:<span class="cit-fpage">135</span>–<span class="cit-lpage">39</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1016/j.jns.2006.06.009</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>16859710</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1016/j.jns.2006.06.009&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=16859710&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li><li><span class="ref-label">37.</span><a class="rev-xref-ref" href="#xref-ref-37-1" title="View reference 37. in text" id="ref-37">↵</a><div class="cit ref-cit ref-journal" id="cit-37.5.818.37" data-doi="10.1002/brb3.275"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Regan</span>  <span class="cit-name-given-names">RE</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Fisher</span>  <span class="cit-name-given-names">JA</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Duffin</span>  <span class="cit-name-given-names">J</span></span></li></ol><cite>. <span class="cit-article-title">Factors affecting the determination of cerebrovascular reactivity</span>. <abbr class="cit-jnl-abbrev">Brain Behav</abbr> <span class="cit-pub-date">2014</span>;<span class="cit-vol">4</span>:<span class="cit-fpage">775</span>–<span class="cit-lpage">88</span><span class="cit-pub-id-sep cit-pub-id-doi-sep"> </span><span class="cit-pub-id cit-pub-id-doi"><span class="cit-pub-id-scheme-doi">doi:</span>10.1002/brb3.275</span><span class="cit-pub-id-sep cit-pub-id-pmid-sep"> </span><span class="cit-pub-id cit-pub-id-pmid"><span class="cit-pub-id-scheme-pmid">pmid:</span>25328852</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1002/brb3.275&amp;link_type=DOI" class="cit-ref-sprinkles cit-ref-sprinkles-doi cit-ref-sprinkles-crossref"><span>CrossRef</span></a><a href="/lookup/external-ref?access_num=25328852&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F5%2F818.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</span></a></div></div></li></ol></div></div>  </div>

  
  </div>
</div>
  </div>
</div>
</div></div>  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-highwire-node-pager" >
  
      
  
  <div class="pane-content">
    <div class="pager highwire-pager pager-mini clearfix highwire-node-pager highwire-article-pager"><span class="pager-prev"><a href="/content/37/5/811" title="Mitotic Activity in Glioblastoma Correlates with Estimated Extravascular Extracellular Space Derived from Dynamic Contrast-Enhanced MR Imaging" rel="prev" class="pager-link-prev link-icon"><span class="icon-circle-arrow-left"></span> <span class="title">Previous</span></a></span><span class="pager-next"><a href="/content/37/5/825" title="Cough-Associated Changes in CSF Flow in Chiari I Malformation Evaluated by Real-Time MRI" rel="next" class="pager-link-next link-icon-right link-icon"><span class="title">Next</span> <span class="icon-circle-arrow-right"></span></a></span></div>  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-highwire-back-to-top" >
  
      
  
  <div class="pane-content">
    <a href="#page" class="back-to-top" data-icon-position="" data-hide-link-title="0"><span class="icon-chevron-up"></span> Back to top</a>  </div>

  
  </div>
</div>
			</div>
		</div>
		
		<div class="sidebar-right-wrapper grid-10 omega">
			<div class="panel-panel panel-region-sidebar-right">
			  <div class="inside"><div class="panel-pane pane-panels-mini pane-jnl-ajnr-art-issue pane-style-alt-content" >
  
        <h2 class="pane-title">In this issue</h2>
    
  
  <div class="pane-content">
    <div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_art_issue">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-highwire-article-citation" >
  
      
  
  <div class="pane-content">
    <div class="highwire-article-citation highwire-citation-type-highwire-issue node1689" data-node-nid="1689" id="node-1689--21723408550" data-pisa="ajnr;37/5" data-pisa-master="ajnr;37/5" data-apath="/ajnr/37/5.atom"><div class="highwire-cite highwire-cite-highwire-issue highwire-citation-jcore-issue-widget clearfix">
    
      <div class="highwire-cite-highlight"><a href="/content/37/5"  class="highlight-image-linked"><img class="highlight-image" src="http://ajnr-stage2.stage.highwire.org/sites/default/files/styles/medium/public/highwire/ajnr/37/5.cover-source.jpg?itok=QG-QiqQW" alt="American Journal of Neuroradiology: 37 (5)" /></a></div>
  
  <div class="highwire-cite-col">
      
      
          <a href="/content/37/5" class="highwire-cite-linked-title" data-icon-position="" data-hide-link-title="0"><span class="highwire-cite-title">American Journal of Neuroradiology</span></a>      
      
        	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-volume highwire-cite-metadata">Vol. 37</span>, <span  class="highwire-cite-metadata-issue highwire-cite-metadata">Issue 5 </span><div  class="highwire-cite-metadata-pubdate highwire-cite-metadata">1 May 2016 </div></div>
      
      
        	<div class="highwire-cite-extras"><div class='highwire-article-citation-variant-list'><ul class="links variants-list"><li class="toc first"><a href="/content/37/5.toc" class="highwire-variant-link variant-toc " title="Table of Contents" rel="alternate" type="text/html" data-icon-position="" data-hide-link-title="0">Table of Contents</a></li><li class="index-by-author"><a href="/content/37/5.index-by-author" class="highwire-variant-link variant-index-by-author " title="Index by author" rel="alternate" data-icon-position="" data-hide-link-title="0">Index by author</a></li><li class="enclosure-complete-issue last"><a href="/content/ajnr/37/5/local/complete-issue.pdf" class="highwire-variant-link variant-enclosure" title="Complete Issue (PDF)" rel="alternative" data-icon-position="" data-hide-link-title="0">Complete Issue (PDF)</a></li></ul></div></div>
      </div>

</div></div>  </div>

  
  </div>
</div>
  </div>
</div>
  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-panels-mini pane-jnl-ajnr-ad-rhs" >
  
      
  
  <div class="pane-content">
    <div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_ad_rhs">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-dfp-pane text-center" >
  
      
  
  <div class="pane-content">
    <div id="dfp-ad-rhs-wrapper" class="dfp-tag-wrapper">
<div class="slug">Advertisement</div>
<div  id="dfp-ad-rhs" class="dfp-tag-wrapper">
  <script type="text/javascript">
    googletag.cmd.push(function() {
      googletag.display("dfp-ad-rhs");
    });
  </script>
</div>
</div>  </div>

  
  </div>
</div>
  </div>
</div>
  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-panels-mini pane-jnl-ajnr-art-tools" >
  
      
  
  <div class="pane-content">
    <div id="mini-panel-jnl_ajnr_art_tools" class="highwire-2col-stacked panel-display">
	  
  <div class="panel-row-wrapper clearfix">
		<div class="content-left-wrapper content-column">
          <div class="panel-panel panel-region-content-left">
            <div class="inside"><div class="panel-pane pane-highwire-variant-link" >
  
      
  
  <div class="pane-content">
    <a href="/content/ajnr/37/5/818.full-text.print" target="_blank" rel="nofollow" class="link-icon"><span class="icon-print"></span> <span class="title">Print</span></a>  </div>

  
  </div>
<div class="panel-pane pane-highwire-variant-link text-no-wrap" >
  
      
  
  <div class="pane-content">
    <a href="/content/ajnr/37/5/818.full-text.pdf" target="_blank" class="link-icon"><span class="icon-download-alt"></span> <span class="title">Download PDF</span></a>  </div>

  
  </div>
<div class="panel-pane pane-minipanel-dialog-link pane-jnl-ajnr-art-email" >
  
      
  
  <div class="pane-content">
    <div class='minipanel-dialog-wrapper'><div class='minipanel-dialog-link-link'><a href="/" oncontextmenu="javascript: return false;" class="minipanel-dialog-link-trigger link-icon" title="Email this Article"><span class="icon-envelope"></span> <span class="title">Email Article</span></a></div><div class='minipanel-dialog-link-mini' style='display:none'><div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_art_email">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-block pane-forward-form pane-forward" >
  
      
  
  <div class="pane-content">
    <form action="/content/37/5/818/tab-references" method="post" id="forward-form" accept-charset="UTF-8"><div><div id="edit-instructions" class="form-item form-item-label-before form-type-item">
 <p>Thank you for your interest in spreading the word on American Journal of Neuroradiology.</p><p>NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail. We do not capture any email address.</p>
</div>
<div class="form-item form-item-label-before form-type-textfield form-item-email">
  <label for="edit-email">Your Email <span class="form-required" title="This field is required.">*</span></label>
 <input type="text" id="edit-email" name="email" value="" size="58" maxlength="256" class="form-text required" />
</div>
<div class="form-item form-item-label-before form-type-textfield form-item-name">
  <label for="edit-name">Your Name <span class="form-required" title="This field is required.">*</span></label>
 <input type="text" id="edit-name" name="name" value="" size="58" maxlength="256" class="form-text required" />
</div>
<div class="form-item form-item-label-before form-type-textarea form-item-recipients">
  <label for="edit-recipients">Send To <span class="form-required" title="This field is required.">*</span></label>
 <div class="form-textarea-wrapper resizable"><textarea id="edit-recipients" name="recipients" cols="50" rows="5" class="form-textarea required"></textarea></div>
<div class="description">Enter multiple addresses on separate lines or separate them with commas.</div>
</div>
<div id="edit-page" class="form-item form-item-label-before form-type-item">
  <label for="edit-page">You are going to email the following </label>
 <a href="/content/37/5/818" class="active" data-icon-position="" data-hide-link-title="0">Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide</a>
</div>
<div id="edit-subject" class="form-item form-item-label-before form-type-item">
  <label for="edit-subject">Message Subject </label>
 (Your Name) has sent you a message from American Journal of Neuroradiology
</div>
<div id="edit-body" class="form-item form-item-label-before form-type-item">
  <label for="edit-body">Message Body </label>
 (Your Name) thought you would like to see the American Journal of Neuroradiology web site.
</div>
<div class="form-item form-item-label-before form-type-textarea form-item-message">
  <label for="edit-message--2">Your Personal Message </label>
 <div class="form-textarea-wrapper resizable"><textarea id="edit-message--2" name="message" cols="50" rows="10" class="form-textarea"></textarea></div>
</div>
<input type="hidden" name="path" value="node/14468" />
<input type="hidden" name="path_cid" value="" />
<input type="hidden" name="forward_footer" value="" />
<input type="hidden" name="form_build_id" value="form-x10YcbuIy_a9k6-Cxvu3npmeoAMPEjuuIATzn5IzkIg" />
<input type="hidden" name="form_id" value="forward_form" />
<fieldset class="captcha form-wrapper"><legend><span class="fieldset-legend">CAPTCHA</span></legend><div class="fieldset-wrapper"><div class="fieldset-description">This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.</div><input type="hidden" name="captcha_sid" value="108813304" />
<input type="hidden" name="captcha_token" value="d3e2db8fe2900b45b2a755cfe16c1944" />
<input type="hidden" name="captcha_response" value="Google no captcha" />
<div class="g-recaptcha" data-sitekey="6LfnJVIUAAAAAE-bUOMg0MJGki4lqSvDmhJp19fN" data-theme="light" data-type="image"></div></div></fieldset>
<div class="form-actions form-wrapper" id="edit-actions"><input type="submit" id="edit-submit" name="op" value="Send Message" class="form-submit" /></div></div></form>  </div>

  
  </div>
</div>
  </div>
</div>
</div></div>  </div>

  
  </div>
<div class="panel-pane pane-minipanel-dialog-link pane-jnl-ajnr-cite-tool" >
  
      
  
  <div class="pane-content">
    <div class='minipanel-dialog-wrapper'><div class='minipanel-dialog-link-link'><a href="/highwire/citation/14468/download" oncontextmenu="javascript: return false;" class="minipanel-dialog-link-trigger link-icon" title="Citation Tools"><span class="icon-globe"></span> <span class="title">Citation Tools</span></a></div><div class='minipanel-dialog-link-mini' style='display:none'><div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_cite_tool">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-highwire-citation-export" >
  
      
  
  <div class="pane-content">
    <div class="highwire-citation-export">  
  <div class="highwire-citation-info">
      <div class="highwire-article-citation highwire-citation-type-highwire-article cite-tool-node14468" data-node-nid="14468" id="citation-node-14468--2208829074" data-pisa="ajnr;37/5/818" data-pisa-master="ajnr;ajnr.A4679" data-apath="/ajnr/37/5/818.atom"><div class="highwire-cite highwire-cite-highwire-article highwire-citation-jcore-standard clearfix">
  
  
  
  
      <div class="highwire-cite-title">Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide</div>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0"><span class="nlm-given-names">O.</span> <span class="nlm-surname">Sobczyk</span></span>, <span class="highwire-citation-author" data-delta="1"><span class="nlm-given-names">A.P.</span> <span class="nlm-surname">Crawley</span></span>, <span class="highwire-citation-author" data-delta="2"><span class="nlm-given-names">J.</span> <span class="nlm-surname">Poublanc</span></span>, <span class="highwire-citation-author" data-delta="3"><span class="nlm-given-names">K.</span> <span class="nlm-surname">Sam</span></span>, <span class="highwire-citation-author" data-delta="4"><span class="nlm-given-names">D.M.</span> <span class="nlm-surname">Mandell</span></span>, <span class="highwire-citation-author" data-delta="5"><span class="nlm-given-names">D.J.</span> <span class="nlm-surname">Mikulis</span></span>, <span class="highwire-citation-author" data-delta="6"><span class="nlm-given-names">J.</span> <span class="nlm-surname">Duffin</span></span>, <span class="highwire-citation-author" data-delta="7"><span class="nlm-given-names">J.A.</span> <span class="nlm-surname">Fisher</span></span></span></div>
  
    	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-journal highwire-cite-metadata">American Journal of Neuroradiology </span><span  class="highwire-cite-metadata-date highwire-cite-metadata">May 2016, </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">37 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(5) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">818-824; </span><span  class="highwire-cite-metadata-doi highwire-cite-metadata"><span class="label">DOI:</span> 10.3174/ajnr.A4679 </span></div>
  
  
  
</div>
</div>  </div>
  <div class="highwire-citation-formats">
  	      <h2>Citation Manager Formats</h2>
        <div class="highwire-citation-formats-links">
      <span class="Z3988" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.spage=818&amp;rft.epage=824&amp;rft.atitle=Identifying%20Significant%20Changes%20in%20Cerebrovascular%20Reactivity%20to%20Carbon%20Dioxide&amp;rft.volume=37&amp;rft.issue=5&amp;rft.date=2016-05-01%2000%3A00%3A00&amp;rft.stitle&amp;rft.jtitle=American%20Journal%20of%20Neuroradiology&amp;rft.au=Sobczyk%2C+O.&amp;rft.au=Crawley%2C+A.P.&amp;rft.au=Poublanc%2C+J.&amp;rft.au=Sam%2C+K.&amp;rft.au=Mandell%2C+D.M.&amp;rft.au=Mikulis%2C+D.J.&amp;rft.au=Duffin%2C+J.&amp;rft.au=Fisher%2C+J.A."></span><ul class="hw-citation-links inline button button-alt button-grid clearfix"><li class="bibtext first"><a href="/highwire/citation/14468/bibtext" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">BibTeX</a></li><li class="bookends"><a href="/highwire/citation/14468/bookends" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">Bookends</a></li><li class="easybib"><a href="/highwire/citation/14468/easybib" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">EasyBib</a></li><li class="endnote-tagged"><a href="/highwire/citation/14468/endnote-tagged" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">EndNote (tagged)</a></li><li class="endnote-8-xml"><a href="/highwire/citation/14468/endnote-8-xml" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">EndNote 8 (xml)</a></li><li class="medlars"><a href="/highwire/citation/14468/medlars" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">Medlars</a></li><li class="mendeley"><a href="/highwire/citation/14468/mendeley" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">Mendeley</a></li><li class="papers"><a href="/highwire/citation/14468/papers" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">Papers</a></li><li class="refworks-tagged"><a href="/highwire/citation/14468/refworks-tagged" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">RefWorks Tagged</a></li><li class="reference-manager"><a href="/highwire/citation/14468/reference-manager" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">Ref Manager</a></li><li class="ris"><a href="/highwire/citation/14468/ris" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">RIS</a></li><li class="zotero last"><a href="/highwire/citation/14468/zotero" class="hw-download-citation-link" data-icon-position="" data-hide-link-title="0">Zotero</a></li></ul>    </div>
  </div>
</div>
  </div>

  
  </div>
</div>
  </div>
</div>
</div></div>  </div>

  
  </div>
</div>
          </div>
        </div>
        
        <div class="content-right-wrapper content-column">
          <div class="panel-panel panel-region-content-right">
            <div class="inside"><div class="panel-pane pane-highwire-share-link highwire_clipboard_link_ajax"  id="shareit">
  
      
  
  <div class="pane-content">
    <a href="/" class="link-icon"><span class="icon-share-alt"></span> <span class="title">Share</span></a>  </div>

  
  </div>
<div class="panel-pane pane-panels-mini pane-jnl-ajnr-share highwire_clipboard_form_ajax_shareit" >
  
      
  
  <div class="pane-content">
    <div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_share">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-highwire-article-citation large-margin-bottom" >
  
      
  
  <div class="pane-content">
    <div class="highwire-article-citation highwire-citation-type-highwire-article node14468--3" data-node-nid="14468" id="share-node-14468--4815136295" data-pisa="ajnr;37/5/818" data-pisa-master="ajnr;ajnr.A4679" data-apath="/ajnr/37/5/818.atom"><div class="highwire-cite highwire-cite-highwire-article highwire-citation-jcore-standard clearfix">
  
  
  
  
      <div class="highwire-cite-title">Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide</div>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0"><span class="nlm-given-names">O.</span> <span class="nlm-surname">Sobczyk</span></span>, <span class="highwire-citation-author" data-delta="1"><span class="nlm-given-names">A.P.</span> <span class="nlm-surname">Crawley</span></span>, <span class="highwire-citation-author" data-delta="2"><span class="nlm-given-names">J.</span> <span class="nlm-surname">Poublanc</span></span>, <span class="highwire-citation-author" data-delta="3"><span class="nlm-given-names">K.</span> <span class="nlm-surname">Sam</span></span>, <span class="highwire-citation-author" data-delta="4"><span class="nlm-given-names">D.M.</span> <span class="nlm-surname">Mandell</span></span>, <span class="highwire-citation-author" data-delta="5"><span class="nlm-given-names">D.J.</span> <span class="nlm-surname">Mikulis</span></span>, <span class="highwire-citation-author" data-delta="6"><span class="nlm-given-names">J.</span> <span class="nlm-surname">Duffin</span></span>, <span class="highwire-citation-author" data-delta="7"><span class="nlm-given-names">J.A.</span> <span class="nlm-surname">Fisher</span></span></span></div>
  
    	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-journal highwire-cite-metadata">American Journal of Neuroradiology </span><span  class="highwire-cite-metadata-date highwire-cite-metadata">May 2016, </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">37 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(5) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">818-824; </span><span  class="highwire-cite-metadata-doi highwire-cite-metadata"><span class="label">DOI:</span> 10.3174/ajnr.A4679 </span></div>
  
  
  
</div>
</div>  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-highwire-article-clipboard-copy large-margin-bottom" >
  
      
  
  <div class="pane-content">
    <div class = "clipboard-copy">
  <span class="label-url">
    <label for="dynamic">Share This Article:</label>
  </span>
  <span class="input-text-url">
    <input type="text" id="dynamic" value="http://ajnr-stage2.stage.highwire.org/content/37/5/818" size="50"/>
  </span>
  <span class="copy-button button">
    <button id="copy-dynamic" class="clipboardjs-button" data-clipboard-target="#dynamic" data-clipboard-alert-style="tooltip" data-clipboard-alert-text="Copied!">Copy</button>
  </span>
</div>
  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-service-links" >
  
      
  
  <div class="pane-content">
    <div class="service-links"><a href="http://del.icio.us/post?url=http%3A//ajnr-stage2.stage.highwire.org/content/37/5/818&amp;title=Identifying%20Significant%20Changes%20in%20Cerebrovascular%20Reactivity%20to%20Carbon%20Dioxide" id="delicious" title="Bookmark this post on del.icio.us" class="service-links-delicious" rel="nofollow" target="_blank" data-icon-position="" data-hide-link-title="0"><img src="http://ajnr-stage2.stage.highwire.org/sites/all/modules/highwire/highwire/images/delicious-32.png" alt="del.icio.us logo" /></a> <a href="http://twitter.com/share?url=http%3A//ajnr-stage2.stage.highwire.org/content/37/5/818&amp;text=Identifying%20Significant%20Changes%20in%20Cerebrovascular%20Reactivity%20to%20Carbon%20Dioxide" id="twitter" title="Share this on Twitter" class="service-links-twitter" rel="nofollow" target="_blank" data-icon-position="" data-hide-link-title="0"><img src="http://ajnr-stage2.stage.highwire.org/sites/all/modules/highwire/highwire/images/twitter.png" alt="Twitter logo" /></a> <a href="http://www.facebook.com/sharer.php?u=http%3A//ajnr-stage2.stage.highwire.org/content/37/5/818&amp;t=Identifying%20Significant%20Changes%20in%20Cerebrovascular%20Reactivity%20to%20Carbon%20Dioxide" id="facebook" title="Share on Facebook" class="service-links-facebook" rel="nofollow" target="_blank" data-icon-position="" data-hide-link-title="0"><img src="http://ajnr-stage2.stage.highwire.org/sites/all/modules/highwire/highwire/images/fb-blue.png" alt="Facebook logo" /></a> <a href="http://www.mendeley.com/import/?url=http%3A//ajnr-stage2.stage.highwire.org/content/37/5/818&amp;title=Identifying%20Significant%20Changes%20in%20Cerebrovascular%20Reactivity%20to%20Carbon%20Dioxide" id="mendeley" title="Share on Mendeley" class="service-links-mendeley" rel="nofollow" target="_blank" data-icon-position="" data-hide-link-title="0"><img src="http://ajnr-stage2.stage.highwire.org/sites/all/modules/highwire/highwire/images/mendeley.png" alt="Mendeley logo" /></a></div>  </div>

  
  </div>
</div>
  </div>
</div>
  </div>

  
  </div>
<div class="panel-pane pane-service-links" >
  
      
  
  <div class="pane-content">
    <div class="service-links"><div class="item-list"><ul><li class="first"><a href="http://twitter.com/share?url=http%3A//ajnr-stage2.stage.highwire.org/content/37/5/818&amp;count=horizontal&amp;via=&amp;text=Identifying%20Significant%20Changes%20in%20Cerebrovascular%20Reactivity%20to%20Carbon%20Dioxide&amp;counturl=http%3A//ajnr-stage2.stage.highwire.org/content/37/5/818" class="twitter-share-button service-links-twitter-widget" id="twitter_widget" title="Tweet This" rel="nofollow" target="_blank" data-icon-position="" data-hide-link-title="0"><span class="element-invisible">Tweet Widget</span></a></li><li><a href="http://www.facebook.com/plugins/like.php?href=http%3A//ajnr-stage2.stage.highwire.org/content/37/5/818&amp;layout=button_count&amp;show_faces=false&amp;action=like&amp;colorscheme=light&amp;width=100&amp;height=21&amp;font=&amp;locale=" id="facebook_like" title="I Like it" class="service-links-facebook-like" rel="nofollow" target="_blank" data-icon-position="" data-hide-link-title="0"><span class="element-invisible">Facebook Like</span></a></li><li class="last"><a href="http://ajnr-stage2.stage.highwire.org/content/37/5/818" id="google_plus_one" title="Plus it" class="service-links-google-plus-one" rel="nofollow" target="_blank" data-icon-position="" data-hide-link-title="0"><span class="element-invisible">Google Plus One</span></a></li></ul></div></div>  </div>

  
  </div>
</div>
          </div>
        </div>
	</div> <!-- /.panel-row-wrapper -->	
	
	</div>

  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-jnl-ajnr-rental" >
  
      
  
  <div class="pane-content">
    <span class="js-deepdyve-link">
            <a class="button btn btn-primary btn-sm" role="button"  href="https://www.deepdyve.com/doc-view?docId=10.3174/ajnr.A4679&fieldName=journal_doi&affiliateId=asnr"><i class="icon-usd"> </i> Purchase</a>  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-highwire-article-nav mobile-hidden pane-style-alt-content" >
  
        <h2 class="pane-title">Jump to section</h2>
    
  
  <div class="pane-content">
    <div class="highwire-list-wrapper highwire-article-nav highwire-nav-float"><div class="highwire-list"><ul data-highwire-float="1" data-highwire-float-class="grid-10 alpha omega"><li class="parent first odd"><a href="/content/37/5/818" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_art" data-is-tab-link="true" data-icon-position="" data-hide-link-title="0">Article</a><div class="highwire-list"><ul><li class="first odd"><a href="#abstract-1" class="highwire-article-nav-jumplink first" data-panel-ajax-tab="jnl_ajnr_tab_art" data-icon-position="" data-hide-link-title="0">Abstract</a></li><li class="even"><a href="#glossary-1" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_art" data-icon-position="" data-hide-link-title="0">ABBREVIATIONS:</a></li><li class="odd"><a href="#sec-8" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_art" data-icon-position="" data-hide-link-title="0">Materials and Methods</a></li><li class="even"><a href="#sec-16" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_art" data-icon-position="" data-hide-link-title="0">Results</a></li><li class="odd"><a href="#sec-20" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_art" data-icon-position="" data-hide-link-title="0">Discussion</a></li><li class="even"><a href="#sec-26" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_art" data-icon-position="" data-hide-link-title="0">Conclusions</a></li><li class="odd"><a href="#ack-1" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_art" data-icon-position="" data-hide-link-title="0">Acknowledgments</a></li><li class="even"><a href="#fn-group-1" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_art" data-icon-position="" data-hide-link-title="0">Footnotes</a></li><li class="last odd"><a href="#ref-list-1" class="highwire-article-nav-jumplink last" data-panel-ajax-tab="jnl_ajnr_tab_art" data-icon-position="" data-hide-link-title="0">References</a></li></ul></div></li><li class="even"><a href="/content/37/5/818/tab-figures-data" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_data" data-is-tab-link="true" data-icon-position="" data-hide-link-title="0">Figures &amp; Data</a></li><li class="odd"><a href="/content/37/5/818/tab-supplemental" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_supp" data-is-tab-link="true" data-icon-position="" data-hide-link-title="0">Supplemental</a></li><li class="even"><a href="/content/37/5/818/tab-references" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_refs" data-is-tab-link="true" data-icon-position="" data-hide-link-title="0">References</a></li><li class="odd"><a href="/content/37/5/818/tab-article-info" class="highwire-article-nav-jumplink" data-panel-ajax-tab="jnl_ajnr_tab_info" data-is-tab-link="true" data-icon-position="" data-hide-link-title="0">Info &amp; Metrics</a></li><li class="last even"><a href="/content/37/5/818.full.pdf" class="highwire-article-nav-jumplink" data-icon-position="" data-hide-link-title="0"><i class="icon-file-alt"></i> PDF</a></li></ul></div></div>  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-panels-mini pane-jnl-ajnr-accordion" >
  
      
  
  <div class="pane-content">
    <div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_accordion">
  <div class="panel-panel panel-col">
    <div><div id="highwire_article_accordion_container"><h3 ><i class="icon-caret-right"></i> Related Articles</h3><div><div class='highwire-list-footer'><div class="highwire-related-articles-footer"><ul class="links inline"><li class="related-pubmed first"><a href="/lookup/external-ref?link_type=MED_NBRS&amp;access_num=26846924" target="_blank" class="" data-icon-position="" data-hide-link-title="0">PubMed</a></li><li class="related-google-scholar last"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=related&amp;author%5B0%5D=O.%2BSobczyk&amp;author%5B1%5D=A.P.%2BCrawley&amp;author%5B2%5D=J.%2BPoublanc&amp;author%5B3%5D=K.%2BSam&amp;author%5B4%5D=D.M.%2BMandell&amp;author%5B5%5D=D.J.%2BMikulis&amp;author%5B6%5D=J.%2BDuffin&amp;author%5B7%5D=J.A.%2BFisher&amp;title=Identifying%2BSignificant%2BChanges%2Bin%2BCerebrovascular%2BReactivity%2Bto%2BCarbon%2BDioxide&amp;publication_year=2016&amp;path=content/37/5/818" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Google Scholar</a></li></ul></div></div></div><h3 ><i class="icon-caret-right"></i> Cited By...</h3><div><div class="highwire-list highwire-cited-by"><ul><li class="first odd"><a href="http://biorxiv.org/cgi/content/full/2024.11.14.623430v1" class="" data-icon-position="" data-hide-link-title="0"><div class="highwire-cite-title">Variable Cerebral Blood Flow Responsiveness to Acute Hypoxic Hypoxia</div></a><div class="variant-links"></div></li><li class="even"><a href="http://biorxiv.org/cgi/content/full/2022.04.27.489686v1" class="" data-icon-position="" data-hide-link-title="0"><div class="highwire-cite-title">Perfusion Quantification in the Human Brain Using DSC MRI - Simulations and Validations at 3T</div></a><div class="variant-links"></div></li><li class="last odd"><a href="http://www.ajnr.org/cgi/content/full/40/1/45" class="" data-icon-position="" data-hide-link-title="0"><div class="highwire-cite-title">Improved White Matter Cerebrovascular Reactivity after Revascularization in Patients with Steno-Occlusive Disease</div></a><div class="variant-links"></div></li></ul></div><div class='highwire-list-footer'><ul class="links inline"><li class="citing-cross-ref first"><a href="/crossref-forward-links/ajnr/37/5/818#crossref" class="hw-crossref hw-crossref-link-ajax" data-list-wrapper="hw-crossref-list-wrapper" target="_blank" data-icon-position="" data-hide-link-title="0">Crossref</a></li><li class="citing-google-scholar last"><a href="/lookup/google-scholar?link_type=googlescholar&amp;gs_type=citedby&amp;path=content/37/5/818" target="_blank" class="" data-icon-position="" data-hide-link-title="0">Google Scholar</a></li></ul></div><div title="Crossref Cited-by Linking Search Results" style="display:none;" class="hw-crossref-list-wrapper"><p class = "hw-crossref-message">This article has not yet been cited by articles in journals that are participating in Crossref Cited-by Linking.</p></div></div><h3 ><i class="icon-caret-right"></i> More in this TOC Section</h3><div><div class="highwire-list"><div class="highwire-articles-in-toc adult-brain"><h3 class="highwire-toc-heading">ADULT BRAIN</h3>
<div class="highwire-list highwire-article-citation-list"><ul><li class="first odd"><div class="highwire-article-citation highwire-citation-type-highwire-article node105026" data-node-nid="105026" id="node-105026--2558853521" data-pisa="ajnr;44/12/1358" data-pisa-master="ajnr;ajnr.A7974" data-apath="/ajnr/44/12/1358.atom"><div class="highwire-cite highwire-cite-highwire-article highwire-citation-jcore-standard-title-only clearfix">
  
  
  
  
      <a href="/content/44/12/1358" class="highwire-cite-linked-title" data-icon-position="" data-hide-link-title="0"><span class="highwire-cite-title">Monoclonal Antibodies: What the Diagnostic Neuroradiologist Needs to Know</span></a>  
  
  
  
  
</div>
</div></li><li class="even"><div class="highwire-article-citation highwire-citation-type-highwire-article node104240" data-node-nid="104240" id="node-104240--2308900170" data-pisa="ajnr;44/10/1150" data-pisa-master="ajnr;ajnr.A7993" data-apath="/ajnr/44/10/1150.atom"><div class="highwire-cite highwire-cite-highwire-article highwire-citation-jcore-standard-title-only clearfix">
  
  
  
  
      <a href="/content/44/10/1150" class="highwire-cite-linked-title" data-icon-position="" data-hide-link-title="0"><span class="highwire-cite-title">Prospective, Longitudinal Study of Clinical Outcome and Morphometric Posterior Fossa Changes after Craniocervical Decompression for Symptomatic Chiari I Malformation</span></a>  
  
  
  
  
</div>
</div></li><li class="last odd"><div class="highwire-article-citation highwire-citation-type-highwire-article node104244" data-node-nid="104244" id="node-104244--22019086894" data-pisa="ajnr;44/10/1135" data-pisa-master="ajnr;ajnr.A7998" data-apath="/ajnr/44/10/1135.atom"><div class="highwire-cite highwire-cite-highwire-article highwire-citation-jcore-standard-title-only clearfix">
  
  
  
  
      <a href="/content/44/10/1135" class="highwire-cite-linked-title" data-icon-position="" data-hide-link-title="0"><span class="highwire-cite-title">Segmentation of Brain Metastases Using Background Layer Statistics (BLAST)</span></a>  
  
  
  
  
</div>
</div></li></ul></div><div class='highwire-list-footer'><a href="/content/by/section/ADULT%20BRAIN" class="" data-icon-position="" data-hide-link-title="0">Show more <span class="wrapper">ADULT BRAIN</span>
</a></div></div><div class="highwire-articles-in-toc functional"><h3 class="highwire-toc-heading">FUNCTIONAL</h3>
<div class="highwire-list highwire-article-citation-list"><ul><li class="first odd"><div class="highwire-article-citation highwire-citation-type-highwire-article node103484" data-node-nid="103484" id="node-103484--22015519776" data-pisa="ajnr;44/8/974" data-pisa-master="ajnr;ajnr.A7929" data-apath="/ajnr/44/8/974.atom"><div class="highwire-cite highwire-cite-highwire-article highwire-citation-jcore-standard-title-only clearfix">
  
  
  
  
      <a href="/content/44/8/974" class="highwire-cite-linked-title" data-icon-position="" data-hide-link-title="0"><span class="highwire-cite-title">Epileptogenic Tubers Are Associated with Increased Kurtosis of Susceptibility Values: A Combined Quantitative Susceptibility Mapping and Stereoelectroencephalography Pilot Study</span></a>  
  
  
  
  
</div>
</div></li><li class="even"><div class="highwire-article-citation highwire-citation-type-highwire-article node103499" data-node-nid="103499" id="node-103499--2762071080" data-pisa="ajnr;44/8/967" data-pisa-master="ajnr;ajnr.A7928" data-apath="/ajnr/44/8/967.atom"><div class="highwire-cite highwire-cite-highwire-article highwire-citation-jcore-standard-title-only clearfix">
  
  
  
  
      <a href="/content/44/8/967" class="highwire-cite-linked-title" data-icon-position="" data-hide-link-title="0"><span class="highwire-cite-title">Glutaric Aciduria Type 1: Comparison between Diffusional Kurtosis Imaging and Conventional MR Imaging</span></a>  
  
  
  
  
</div>
</div></li><li class="last odd"><div class="highwire-article-citation highwire-citation-type-highwire-article node103123" data-node-nid="103123" id="node-103123--2517211466" data-pisa="ajnr;44/7/776" data-pisa-master="ajnr;ajnr.A7903" data-apath="/ajnr/44/7/776.atom"><div class="highwire-cite highwire-cite-highwire-article highwire-citation-jcore-standard-title-only clearfix">
  
  
  
  
      <a href="/content/44/7/776" class="highwire-cite-linked-title" data-icon-position="" data-hide-link-title="0"><span class="highwire-cite-title">Choroid Plexus Calcification Correlates with Cortical Microglial Activation in Humans: A Multimodal PET, CT, MRI Study</span></a>  
  
  
  
  
</div>
</div></li></ul></div><div class='highwire-list-footer'><a href="/content/by/section/FUNCTIONAL" class="" data-icon-position="" data-hide-link-title="0">Show more <span class="wrapper">FUNCTIONAL</span>
</a></div></div></div></div><h3 ><i class="icon-caret-right"></i> Similar Articles</h3><div><div class="highwire-search-similar-ajax-wrapper" id="highwire-search-similar-articles-list-1"><div class="highwire-ajax-loading"><span class="icon-spinner icon-spin icon-2x"></span></div></div></div></div></div>
  </div>
</div>
  </div>

  
  </div>
</div>
			</div>
		</div>
	
	</div> <!-- /.panel-row-wrapper -->	
	
	</div>

    </div>
  </div>
</div><div class="block block-panels-mini more-padding-top mobile-hiddens block-jnl-ajnr-ad-bot-leaderboard block-panels-mini-jnl-ajnr-ad-bot-leaderboard even block-without-title" id="block-panels-mini-jnl-ajnr-ad-bot-leaderboard">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_ad_bot_leaderboard">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-dfp-pane text-center" >
  
      
  
  <div class="pane-content">
    <div id="dfp-ad-bottom_leaderboard-wrapper" class="dfp-tag-wrapper">
<div class="slug">Advertisement</div>
<div  id="dfp-ad-bottom_leaderboard" class="dfp-tag-wrapper">
  <script type="text/javascript">
    googletag.cmd.push(function() {
      googletag.display("dfp-ad-bottom_leaderboard");
    });
  </script>
</div>
</div>  </div>

  
  </div>
</div>
  </div>
</div>
    </div>
  </div>
</div>      </div>
</div>  </div>
</section>    
  
      <footer id="section-footer" class="section section-footer">
    
  <div id="zone-postscript" class="zone zone-postscript clearfix container-30">
    <div class="grid-28 suffix-1 prefix-1 region region-postscript-fourth" id="region-postscript-fourth">
  <div class="region-inner region-postscript-fourth-inner">
    <div class="block block-panels-mini block-jnl-ajnr-footer block-panels-mini-jnl-ajnr-footer odd block-without-title" id="block-panels-mini-jnl-ajnr-footer">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <div class="panel-display panels-960-row jcore-row-4col clearfix" id="mini-panel-jnl_ajnr_footer">
  <div class="panel-panel panel-region-col-1 grid-7 alpha">
    <div class="inside"><div class="panel-pane pane-block pane-menu-navigate pane-menu" >
  
        <h2 class="pane-title">News and Updates</h2>
    
  
  <div class="pane-content">
    <nav class="menubar-nav"><ul class="menu" role="menu"><li class="first leaf" role="menuitem"><a href="https://www.ajnr.org/cc/2024-Awards" data-hide-link-title="0" class="" data-icon-position="">2024 Journal Award Winners</a></li>
<li class="last leaf" role="menuitem"><a href="/page/content/Reviewer-Recognition" data-hide-link-title="0" class="" data-icon-position="">Thanks to our 2023 Distinguished Reviewers</a></li>
</ul></nav>  </div>

  
  </div>
</div>
  </div>
  <div class="panel-panel panel-region-col-2 grid-7">
    <div class="inside"><div class="panel-pane pane-block pane-menu-more-information pane-menu" >
  
        <h2 class="pane-title">Resources</h2>
    
  
  <div class="pane-content">
    <nav class="menubar-nav"><ul class="menu" role="menu"><li class="first leaf" role="menuitem"><a href="/page/content/EBM" data-hide-link-title="0" class="" data-icon-position="">Evidence-Based Medicine Level Guide</a></li>
<li class="leaf" role="menuitem"><a href="/content/browse-podcast-archives" data-hide-link-title="0" class="" data-icon-position="">AJNR Podcast Archive</a></li>
<li class="leaf" role="menuitem"><a href="/content/institutional-subscriptions" data-hide-link-title="0" class="" data-icon-position="">Librarian Resources</a></li>
<li class="last leaf" role="menuitem"><a href="http://www.ajnr.org/page/content/Terms-and-Conditions" data-hide-link-title="0" class="" data-icon-position="">Terms and Conditions</a></li>
</ul></nav>  </div>

  
  </div>
</div>
  </div>
  <div class="panel-panel panel-region-col-3 grid-7">
    <div class="inside"><div class="panel-pane pane-block pane-menu-add-journals pane-menu" >
  
        <h2 class="pane-title">Opportunities</h2>
    
  
  <div class="pane-content">
    <nav class="menubar-nav"><ul class="menu" role="menu"><li class="first last leaf" role="menuitem"><a href="/page/content/Publons" data-hide-link-title="0" class="" data-icon-position="">Get Peer Review Credit from Publons</a></li>
</ul></nav>  </div>

  
  </div>
</div>
  </div>
  <div class="panel-panel panel-region-col-4 grid-7 omega">
    <div class="inside"><div class="panel-pane pane-block pane-menu-other-services pane-menu" >
  
        <h2 class="pane-title">American Society of Neuroradiology</h2>
    
  
  <div class="pane-content">
    <nav class="menubar-nav"><ul class="menu" role="menu"><li class="first leaf" role="menuitem"><a href="http://www.neurographics.org/" data-hide-link-title="0" class="" data-icon-position="">Neurographics</a></li>
<li class="leaf" role="menuitem"><a href="http://www.asnr.org/index.php/education/fellowship-portal/" data-hide-link-title="0" class="" data-icon-position="">Fellowship Portal</a></li>
<li class="last leaf" role="menuitem"><a href="https://www.asnr.org/membership-types/" data-hide-link-title="0" class="" data-icon-position="">Not an ASNR Member? Join Now</a></li>
</ul></nav>  </div>

  
  </div>
</div>
  </div>
</div>    </div>
  </div>
</div>  </div>
</div>  </div>
  
  <div id="zone-footer" class="zone zone-footer clearfix container-30">
    <div class="grid-28 suffix-1 prefix-1 region region-footer-first" id="region-footer-first">
  <div class="region-inner region-footer-first-inner">
    <div class="block block-panels-mini block-jnl-ajnr-foot-info block-panels-mini-jnl-ajnr-foot-info odd block-without-title" id="block-panels-mini-jnl-ajnr-foot-info">
  <div class="block-inner clearfix">
                
    <div class="content clearfix">
      <div class="panel-display panel-1col clearfix" id="mini-panel-jnl_ajnr_foot_info">
  <div class="panel-panel panel-col">
    <div><div class="panel-pane pane-page-logo-footer" >
  
      
  
  <div class="pane-content">
    <img class="footer-logo" src="http://ajnr-stage2.stage.highwire.org/sites/default/files/ajnr-logo.png" alt="" />  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-snippet pane-footer-copyright-text" >
  
      
  
  <div class="pane-content">
    <div class="snippet footer-copyright-text" id="footer-copyright-text">
  
      
  <div class="snippet-content">
    <p>&copy; 2025 by the <a href="http://www.asnr.org">American Society of Neuroradiology</a> All rights, including for text and data mining, AI training, and similar technologies, are reserved.<br />
Print ISSN: 0195-6108 Online ISSN: 1936-959X</p>
  </div>

</div>
  </div>

  
  </div>
<div class="panel-separator"></div><div class="panel-pane pane-highwire-branding" >
  
      
  
  <div class="pane-content">
    <a href="http://home.highwire.org" target="_blank" class="highwire-branding-link" data-icon-position="" data-hide-link-title="0"><img class="logo-highwire" src="http://ajnr-stage2.stage.highwire.org/sites/all/modules/highwire/highwire/plugins/content_types/images/logo_small_hw_white.png" width="190" height="31" alt="Powered by HighWire" /></a>  </div>

  
  </div>
</div>
  </div>
</div>
    </div>
  </div>
</div>  </div>
</div>  </div>
</footer>  </div>    <div class="region region-page-bottom" id="region-page-bottom">
  <div class="region-inner region-page-bottom-inner">
      </div>
</div><script type="text/javascript" src="/sites/default/files/advagg_js/js__bnwyEQSuZLC-kZnFqCi5iE02nOCzM7DjY7zYxcN9nsQ__VBiBT_qq_eHMMO2Q1rXK1u-hHff31XLUkmi9dgjuPeY__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__GM3GJPR36rRIz0TRkjC5OQwrioSyN9aoYRivDhCO_AM__qAl84FcCv2jyN22yFGS5Oc85cjd9zKX6p_cFNLGhe-M__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js" async="async"></script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__o2aEARZ6jM5u2XKtczQNm8fkSHQ5xpeZCVbqijSRAQE__Qo68euIrLw8Gh5HZtc5MRP5-COHtCWls1DLLZREopm0__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
function euCookieComplianceLoadScripts() {}
//--><!]]>
</script>
<script type="text/javascript">
<!--//--><![CDATA[//><!--
var eu_cookie_compliance_cookie_name = "";
//--><!]]>
</script>
<script type="text/javascript" src="/sites/default/files/advagg_js/js__WcTpt-w0y1FyXrxZNriX8Ts1KjsFTDpdvZaw9yhRn24__aFJpdvsZPb1v9rWrq-WXbz_WQ9IThQN-mFTCdm1cfXc__Op4k-kV4DoWc7bsUP7umKmZ0WXfmoYdRDoZFPNSd-oM.js"></script>
  </body>
</html>