American Journal of Neuroradiology: 37 (8)

August 01, 2016; Volume 37,Issue 8

Perspectives

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Perspectives
Bejoy Thomas

American Journal of Neuroradiology August 2016, 37 (8) 1383; DOI: https://doi.org/10.3174/ajnr.P0019

Review Article

ADULT BRAIN

Open Access
Imaging of Neurovascular Compression Syndromes: Trigeminal Neuralgia, Hemifacial Spasm, Vestibular Paroxysmia, and Glossopharyngeal Neuralgia
S. Haller, L. Etienne, E. Kövari, A.D. Varoquaux, H. Urbach and M. Becker

American Journal of Neuroradiology August 2016, 37 (8) 1384-1392; DOI: https://doi.org/10.3174/ajnr.A4683

General Contents

FELLOWS' JOURNAL CLUBADULT BRAIN

Open Access
Multimodal CT Imaging: Time to Treatment and Outcomes in the IMS III Trial
A. Vagal, L.D. Foster, B. Menon, A. Livorine, J. Shi, E. Qazi, S.D. Yeatts, A.M. Demchuk, M.D. Hill, T.A. Tomsick and M. Goyal

American Journal of Neuroradiology August 2016, 37 (8) 1393-1398; DOI: https://doi.org/10.3174/ajnr.A4751

The authors explored the effect of multimodal imaging (CT perfusion and/or CT angiography) versus noncontrast CT alone on time to treatment and outcomes in the IMS III trial. Of 656 subjects enrolled in the trial, 90 (13.7%) received CTP and CTA, 216 (32.9%) received CTA (without CTP), and 342 (52.1%) received NCCT alone. Median times from stroke onset to IV tPA in the CTP+CTA, CTA, and NCCT groups were 120.5 vs 117.5 vs 120 minutes, respectively. They conclude that the use of CTA (with or without CTP) did not delay IV tPA or endovascular therapy compared with NCCT in the IMS III trial.
ADULT BRAIN

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Performance of CT ASPECTS and Collateral Score in Risk Stratification: Can Target Perfusion Profiles Be Predicted without Perfusion Imaging?
S. Dehkharghani, R. Bammer, M. Straka, M. Bowen, J.W. Allen, S. Rangaraju, J. Kang, T. Gleason, C. Brasher and F. Nahab

American Journal of Neuroradiology August 2016, 37 (8) 1399-1404; DOI: https://doi.org/10.3174/ajnr.A4727
ADULT BRAIN

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MR Imaging in Spinocerebellar Ataxias: A Systematic Review
A. Klaes, E. Reckziegel, M.C. Franca, T.J.R. Rezende, L.M. Vedolin, L.B. Jardim and J.A. Saute

American Journal of Neuroradiology August 2016, 37 (8) 1405-1412; DOI: https://doi.org/10.3174/ajnr.A4760
ADULT BRAIN

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Geometric Parameter Analysis of Ruptured and Unruptured Aneurysms in Patients with Symmetric Bilateral Intracranial Aneurysms: A Multicenter CT Angiography Study
Z.-Q. Huang, Z.-H. Meng, Z.-J. Hou, S.-Q. Huang, J.-N. Chen, H. Yu, L.-J. Feng, Q.-J. Wang, P.-A. Li and Z.-B. Wen

American Journal of Neuroradiology August 2016, 37 (8) 1413-1417; DOI: https://doi.org/10.3174/ajnr.A4764
ADULT BRAIN

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MRI Appearance of Intracerebral Iodinated Contrast Agents: Is It Possible to Distinguish Extravasated Contrast Agent from Hemorrhage?
O. Nikoubashman, F. Jablawi, S. Dekeyzer, A.M. Oros-Peusquens, Z. Abbas, J. Lindemeyer, A.E. Othman, N.J. Shah and M. Wiesmann

American Journal of Neuroradiology August 2016, 37 (8) 1418-1421; DOI: https://doi.org/10.3174/ajnr.A4755
ADULT BRAIN

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Prevalence of Intracranial Aneurysms in Patients with Connective Tissue Diseases: A Retrospective Study
S.T. Kim, W. Brinjikji and D.F. Kallmes

American Journal of Neuroradiology August 2016, 37 (8) 1422-1426; DOI: https://doi.org/10.3174/ajnr.A4718
FELLOWS' JOURNAL CLUBADULT BRAIN

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T1 Signal-Intensity Increase in the Dentate Nucleus after Multiple Exposures to Gadodiamide: Intraindividual Comparison between 2 Commonly Used Sequences
J. Ramalho, M. Ramalho, M. AlObaidy, R.H. Nunes, M. Castillo and R.C. Semelka

American Journal of Neuroradiology August 2016, 37 (8) 1427-1431; DOI: https://doi.org/10.3174/ajnr.A4757

The authors performed intraindividual qualitative and quantitative comparison between T1-weighted spin-echo and 3D MPRAGE images in 18 patients who had multiple exposures to gadodiamide. Differences in signal between the 2 sequences for both baseline and last examination dentate nucleus/middle cerebellar peduncle ratios were statistically significant. They conclude that T1-weighted spin-echo and MPRAGE sequences cannot be used interchangeably for qualitative or quantitative signal intensity analysis of the dentate nucleus in patients who received gadodiamide.
ADULT BRAIN

Open Access
Characteristics of Diffusional Kurtosis in Chronic Ischemia of Adult Moyamoya Disease: Comparing Diffusional Kurtosis and Diffusion Tensor Imaging
K. Kazumata, K.K. Tha, H. Narita, Y.M. Ito, H. Shichinohe, M. Ito, H. Uchino and T. Abumiya

American Journal of Neuroradiology August 2016, 37 (8) 1432-1439; DOI: https://doi.org/10.3174/ajnr.A4728
EDITOR'S CHOICEADULT BRAIN

Open Access
Improved Leakage Correction for Single-Echo Dynamic Susceptibility Contrast Perfusion MRI Estimates of Relative Cerebral Blood Volume in High-Grade Gliomas by Accounting for Bidirectional Contrast Agent Exchange
K. Leu, J.L. Boxerman, T.F. Cloughesy, A. Lai, P.L. Nghiemphu, L.M. Liau, W.B. Pope and B.M. Ellingson

American Journal of Neuroradiology August 2016, 37 (8) 1440-1446; DOI: https://doi.org/10.3174/ajnr.A4759

The authors' hypothesis is that incorporating bidirectional contrast agent transport into the DSC MR imaging signal model will improve rCBV estimates in brain tumors. A unidirectional contrast agent extravasation model (Boxerman-Weisskoff) was compared with a bidirectional contrast agent exchange model. For both models, they compared the goodness of fit with the parent leakage-contaminated relaxation rate curves and the difference between modeled interstitial relaxation rate curves and dynamic contrast-enhanced MR imaging in 21 patients with glioblastoma. The authors conclude that the bidirectional model more accurately corrects for the T1 or T2* enhancement arising from contrast agent extravasation due to blood-brain barrier disruption in high-grade gliomas by incorporating interstitial washout rates into the DSC MR imaging relaxation rate model.
ADULT BRAIN

Open Access
Lesion Heterogeneity on High-Field Susceptibility MRI Is Associated with Multiple Sclerosis Severity
D.M. Harrison, X. Li, H. Liu, C.K. Jones, B. Caffo, P.A. Calabresi and P. van Zijl

American Journal of Neuroradiology August 2016, 37 (8) 1447-1453; DOI: https://doi.org/10.3174/ajnr.A4726
EDITOR'S CHOICEADULT BRAIN

Open Access
Cortical Perfusion Alteration in Normal-Appearing Gray Matter Is Most Sensitive to Disease Progression in Relapsing-Remitting Multiple Sclerosis
S.-P. Hojjat, M. Kincal, R. Vitorino, C.G. Cantrell, A. Feinstein, L. Zhang, L. Lee, P. O'Connor, T.J. Carroll and R.I. Aviv

American Journal of Neuroradiology August 2016, 37 (8) 1454-1461; DOI: https://doi.org/10.3174/ajnr.A4737

Bookend perfusion was used to quantify parameters in normal-appearing and lesional tissue at different relapsing-remitting MS stages in 39 patients and 19 age-matched healthy controls. Perfusion parameters such as CBF, CBV, and MTT were compared along with cognitive performance. White matter lesion but not cortical lesion perfusion was significantly reduced in cognitively impaired patients with relapsing-remitting MS versus unimpaired patients with relapsing-remitting MS. Perfusion reduction with disease progression was greater in normal-appearing gray matter and normal-appearing white matter compared with cortical lesions and white matter lesions. The authors conclude that the greatest changes are present within NAGM and NAWM, necessitating absolute rather than relative lesion perfusion measurement.
ADULT BRAIN

Open Access
A Diffusion Tensor Imaging Study on White Matter Abnormalities in Patients with Type 2 Diabetes Using Tract-Based Spatial Statistics
Y. Xiong, Y. Sui, Z. Xu, Q. Zhang, M.M. Karaman, K. Cai, T.M. Anderson, W. Zhu, J. Wang and X.J. Zhou

American Journal of Neuroradiology August 2016, 37 (8) 1462-1469; DOI: https://doi.org/10.3174/ajnr.A4740
EDITOR'S CHOICEADULT BRAIN

Open Access
Electrophysiologic Validation of Diffusion Tensor Imaging Tractography during Deep Brain Stimulation Surgery
V.A. Coenen, C. Jenkner, C.R. Honey and B. Mädler

American Journal of Neuroradiology August 2016, 37 (8) 1470-1478; DOI: https://doi.org/10.3174/ajnr.A4753

Eleven patients underwent subthalamic nucleus deep brain stimulation. DTI and high-resolution T1- and T2-weighted MRI were performed at 3T. The electrode positions and current amplitudes that elicited corticospinal tract effects during the operation were studied to determine relative corticospinal tract distance. The mean intraoperative electrophysiologic corticospinal tract distance was 3.0 mm +/- 0.6 mm; the mean image-derived corticospinal tract distance (DTI fiber tractography) was 3.0 mm +/- 1.3 mm. DTI fiber tractography depicted the medial corticospinal border in concordance with electrophysiology under 2 different conditions and modeling approaches. Under both conditions, the electrophysiologic measurements were clearly related to the DTI fiber tractography.
ADULT BRAIN

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Neurovascular Manifestations of Hereditary Hemorrhagic Telangiectasia: A Consecutive Series of 376 Patients during 15 Years
W. Brinjikji, V.N. Iyer, V. Yamaki, G. Lanzino, H.J. Cloft, K.R. Thielen, K.L. Swanson and C.P. Wood

American Journal of Neuroradiology August 2016, 37 (8) 1479-1486; DOI: https://doi.org/10.3174/ajnr.A4762
ADULT BRAIN

Open Access
Reduced Myelin Water in the White Matter Tracts of Patients with Niemann-Pick Disease Type C
J. Davies-Thompson, I. Vavasour, M. Scheel, A. Rauscher and J.J.S. Barton

American Journal of Neuroradiology August 2016, 37 (8) 1487-1489; DOI: https://doi.org/10.3174/ajnr.A4719
INTERVENTIONAL

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Fate of Coiled Aneurysms with Minor Recanalization at 6 Months: Rate of Progression to Further Recanalization and Related Risk Factors
J.P. Jeon, Y.D. Cho, J.K. Rhim, D.H. Yoo, W.-S. Cho, H.-S. Kang, J.E. Kim and M.H. Han

American Journal of Neuroradiology August 2016, 37 (8) 1490-1495; DOI: https://doi.org/10.3174/ajnr.A4763
EXTRACRANIAL VASCULAR

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Prediction of Carotid Intraplaque Hemorrhage Using Adventitial Calcification and Plaque Thickness on CTA
L.B. Eisenmenger, B.W. Aldred, S.-E. Kim, G.J. Stoddard, A. de Havenon, G.S. Treiman, D.L. Parker and J.S. McNally

American Journal of Neuroradiology August 2016, 37 (8) 1496-1503; DOI: https://doi.org/10.3174/ajnr.A4765
HEAD & NECK

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Do Radiologists Report the TNM Staging in Radiology Reports for Head and Neck Cancers? A National Survey Study
B. Ko, U. Parvathaneni, P.A. Hudgins and Y. Anzai

American Journal of Neuroradiology August 2016, 37 (8) 1504-1509; DOI: https://doi.org/10.3174/ajnr.A4742
HEAD & NECK

Open Access
Reduced Field-of-View Diffusion Tensor Imaging of the Optic Nerve in Retinitis Pigmentosa at 3T
Y. Zhang, X. Guo, M. Wang, L. Wang, Q. Tian, D. Zheng and D. Shi

American Journal of Neuroradiology August 2016, 37 (8) 1510-1515; DOI: https://doi.org/10.3174/ajnr.A4767
PEDIATRICS

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A New Ultrasound Marker for Bedside Monitoring of Preterm Brain Growth
J.A. Roelants, I.V. Koning, M.M.A. Raets, S.P. Willemsen, M.H. Lequin, R.P.M. Steegers-Theunissen, I.K.M. Reiss, M.J. Vermeulen, P. Govaert and J. Dudink

American Journal of Neuroradiology August 2016, 37 (8) 1516-1522; DOI: https://doi.org/10.3174/ajnr.A4731
PEDIATRICS

Open Access
MR Imaging of the Pituitary Gland and Postsphenoid Ossification in Fetal Specimens
T.M. Mehemed, Y. Fushimi, T. Okada, M. Kanagaki, A. Yamamoto, T. Okada, T. Takakuwa, S. Yamada and K. Togashi

American Journal of Neuroradiology August 2016, 37 (8) 1523-1527; DOI: https://doi.org/10.3174/ajnr.A4808
PEDIATRICS

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Quiet T1-Weighted Pointwise Encoding Time Reduction with Radial Acquisition for Assessing Myelination in the Pediatric Brain
N. Aida, T. Niwa, Y. Fujii, K. Nozawa, M. Enokizono, K. Murata and T. Obata

American Journal of Neuroradiology August 2016, 37 (8) 1528-1534; DOI: https://doi.org/10.3174/ajnr.A4747
PEDIATRICS

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Cranial Ultrasonography in Infantile Encephalitic Beriberi: A Useful First-Line Imaging Tool for Screening and Diagnosis in Suspected Cases
N.A. Wani, U.A. Qureshi, K. Ahmad and N.A. Choh

American Journal of Neuroradiology August 2016, 37 (8) 1535-1540; DOI: https://doi.org/10.3174/ajnr.A4756
PEDIATRICS

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Spectrum of Clinical and Associated MR Imaging Findings in Children with Olfactory Anomalies
T.N. Booth and N.K. Rollins

American Journal of Neuroradiology August 2016, 37 (8) 1541-1548; DOI: https://doi.org/10.3174/ajnr.A4738
PEDIATRICS

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Reduction of Oxygen-Induced CSF Hyperintensity on FLAIR MR Images in Sedated Children: Usefulness of Magnetization-Prepared FLAIR Imaging
H.-K. Jeong, S.W. Oh, J. Kim, S.-K. Lee and S.J. Ahn

American Journal of Neuroradiology August 2016, 37 (8) 1549-1555; DOI: https://doi.org/10.3174/ajnr.A4723
SPINE

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Effect of the Suboccipital Musculature on Symptom Severity and Recovery after Mild Traumatic Brain Injury
S. Fakhran, C. Qu and L.M. Alhilali

American Journal of Neuroradiology August 2016, 37 (8) 1556-1560; DOI: https://doi.org/10.3174/ajnr.A4730
FELLOWS' JOURNAL CLUBSPINE

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Evaluation of Focal Cervical Spinal Cord Lesions in Multiple Sclerosis: Comparison of White Matter–Suppressed T1 Inversion Recovery Sequence versus Conventional STIR and Proton Density–Weighted Turbo Spin-Echo Sequences
D.K. Sundarakumar, C.M. Smith, W.D. Hwang, M. Mossa-Basha and K.R. Maravilla

American Journal of Neuroradiology August 2016, 37 (8) 1561-1566; DOI: https://doi.org/10.3174/ajnr.A4761

The authors performed a retrospective blinded analysis of cervical cord MR imaging examinations of 50 patients with MS. In each patient, 2 neuroradiologists measured the number of focal lesions and overall lesion conspicuity in the STIR/proton density–weighted TSE and WM-suppressed T1 inversion recovery sequence groups. Substantial interreader agreement was noted on the WM-suppressed T1 inversion recovery sequence compared with STIR/proton density–weighted TSE. Average lesion conspicuity was better on the WM-suppressed T1 inversion recovery sequence. Additionally, spurious lesions were more common on STIR/proton density–weighted TSE than on the WM-suppressed T1 inversion recovery sequence. They conclude that the WM-suppressed T1 inversion recovery sequence could potentially be substituted for either STIR or proton density–weighted TSE sequences in routine clinical protocols.
SPINE

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SAPHO Syndrome: Imaging Findings of Vertebral Involvement
A.M. McGauvran, A.L. Kotsenas, F.E. Diehn, J.T. Wald, C.M. Carr and J.M. Morris

American Journal of Neuroradiology August 2016, 37 (8) 1567-1572; DOI: https://doi.org/10.3174/ajnr.A4736

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