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<meta name="DC.Description" content="SUMMARY: The year 1965 was critical for US health care policy. In that year, Medicare was created as part of the Social Security Act under President Lyndon B. Johnson after several earlier attempts by Presidents Franklin Roosevelt and Harry Truman. In 1966, the American Medical Association first published a set of standard terms and descriptors to document medical procedures, known as Current Procedural Terminology, or CPT. Fifty years later, though providers have certainly heard the term “CPT code,” most would benefit from an enhanced understanding of the historical basis, current structure, and relationship to valuation of Current Procedural Terminology. This article will highlight this evolution, particularly as it relates to neuroradiology.

AMA
:   American Medical Association
ASNR
:   American Society of Neuroradiology
CMS
:   Centers for Medicare and Medicaid Services
CPT
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RUC
:   AMA/Specialty Society Relative Value Scale Update Committee
RVU
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AMA
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ASNR
:   American Society of Neuroradiology
CMS
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CPT
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RUC
:   AMA/Specialty Society Relative Value Scale Update Committee
RVU
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AMA
:   American Medical Association
ASNR
:   American Society of Neuroradiology
CMS
:   Centers for Medicare and Medicaid Services
CPT
:   Current Procedural Terminology
RUC
:   AMA/Specialty Society Relative Value Scale Update Committee
RVU
:   relative value units" />
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    <div class="highwire-article-citation highwire-citation-type-highwire-article node78--5" data-node-nid="78" id="top-node-78--6188951172" data-pisa="ajnr;37/11/1972" data-pisa-master="ajnr;ajnr.A4863" data-apath="/ajnr/37/11/1972.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">
  
  
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      <h1 class="highwire-cite-title" id="page-title">Current Procedural Terminology: History, Structure, and Relationship to Valuation for the Neuroradiologist</h1>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0">T.M. Leslie-Mazwi</span>, <span class="highwire-citation-author" data-delta="1">J.A. Bello</span>, <span class="highwire-citation-author" data-delta="2">R. Tu</span>, <span class="highwire-citation-author" data-delta="3">G.N. Nicola</span>, <span class="highwire-citation-author" data-delta="4">W.D. Donovan</span>, <span class="highwire-citation-author" data-delta="5">R.M. Barr</span> and <span class="highwire-citation-author" data-delta="6">J.A. Hirsch</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">November 2016,  </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">37 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(11) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">1972-1976; </span><span  class="highwire-cite-metadata-doi highwire-cite-metadata">DOI: https://doi.org/10.3174/ajnr.A4863 </span></div>
  
  
  
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<div id="hw-article-author-popups-top-node-78--6188951172" style="display: none;"><div class="author-tooltip-0"><div class="author-tooltip-name">T.M. Leslie-Mazwi </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>a</span>From the Neuroendovascular Program (T.M.L.-M., J.A.H.), Massachusetts General Hospital, Boston, Massachusetts</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=T.M.%2BLeslie-Mazwi%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=Leslie-Mazwi%20T&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%3AT.M.%2BLeslie-Mazwi%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/0000-0002-4191-2466" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for T.M. Leslie-Mazwi</a></li></ul></div><div class="author-tooltip-1"><div class="author-tooltip-name">J.A. Bello </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>b</span>Montefiore Medical Center (J.A.B.), Albert Einstein College of Medicine, Bronx, New York</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.%2BBello%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=Bello%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.%2BBello%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/0000-0002-6540-4423" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for J.A. Bello</a></li></ul></div><div class="author-tooltip-2"><div class="author-tooltip-name">R. Tu </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>c</span>Progressive Radiology (R.T.), The George Washington University, Falls Church, Virginia</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=R.%2BTu%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=Tu%20R&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%3AR.%2BTu%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/0000-0002-5932-3053" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for R. Tu</a></li></ul></div><div class="author-tooltip-3"><div class="author-tooltip-name">G.N. Nicola </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>d</span>Hackensack University Medical Center (G.N.N.), Hackensack, New Jersey</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=G.N.%2BNicola%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=Nicola%20G&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%3AG.N.%2BNicola%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/0000-0003-3959-2069" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for G.N. Nicola</a></li></ul></div><div class="author-tooltip-4"><div class="author-tooltip-name">W.D. Donovan </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>e</span>Norwich Diagnostic Imaging Associates (W.D.D.), Norwich, Connecticut</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=W.D.%2BDonovan%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=Donovan%20W&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%3AW.D.%2BDonovan%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/0000-0002-2550-0445" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for W.D. Donovan</a></li></ul></div><div class="author-tooltip-5"><div class="author-tooltip-name">R.M. Barr </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>f</span>Mecklenburg Radiology Associates P.A. (R.M.B.), Charlotte, North Carolina.</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=R.M.%2BBarr%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=Barr%20R&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%3AR.M.%2BBarr%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/0000-0002-9214-9448" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for R.M. Barr</a></li></ul></div><div class="author-tooltip-6"><div class="author-tooltip-name">J.A. Hirsch </div><div class="author-tooltip-affiliation"><span class="author-tooltip-text"><div class='author-affiliation'><span class='nlm-sup'>a</span>From the Neuroendovascular Program (T.M.L.-M., J.A.H.), Massachusetts General Hospital, Boston, Massachusetts</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.%2BHirsch%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=Hirsch%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.%2BHirsch%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/0000-0002-9594-8798" target="_blank" class="" data-icon-position="" data-hide-link-title="0">ORCID record for J.A. Hirsch</a></li></ul></div></div></div>  </div>

  
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    <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-37.11.1972.1" data-doi="10.1016/j.jacr.2007.10.004"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Thorwarth</span>  <span class="cit-name-given-names">WT</span>  <span class="cit-name-suffix">Jr</span>.</span></li></ol><cite>. <span class="cit-article-title">CPT: an open system that describes all that you do</span>. <abbr class="cit-jnl-abbrev">J Am Coll Radiol</abbr> <span class="cit-pub-date">2008</span>;<span class="cit-vol">5</span>:<span class="cit-fpage">555</span>–<span class="cit-lpage">60</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.jacr.2007.10.004</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>18359442</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1016/j.jacr.2007.10.004&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=18359442&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F11%2F1972.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</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-37.11.1972.2" data-doi="10.1016/S1546-1440(03)00020-6"><div class="cit-metadata"><ol class="cit-auth-list"><li>
</li><li><span class="cit-auth"><span class="cit-name-surname">Thorwarth</span>  <span class="cit-name-given-names">WT</span>  <span class="cit-name-suffix">Jr</span>.</span></li></ol><cite>. <span class="cit-article-title">From concept to CPT code to compensation: how the payment system works</span>. <abbr class="cit-jnl-abbrev">J Am Coll Radiol</abbr> <span class="cit-pub-date">2004</span>;<span class="cit-vol">1</span>:<span class="cit-fpage">48</span>–<span class="cit-lpage">53</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/S1546-1440(03)00020-6</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>17411519</span></cite></div><div class="cit-extra"><a href="/lookup/external-ref?access_num=10.1016/S1546-1440(03)00020-6&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=17411519&amp;link_type=MED&amp;atom=%2Fajnr%2F37%2F11%2F1972.atom" class="cit-ref-sprinkles cit-ref-sprinkles-medline"><span>PubMed</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-37.11.1972.3" data-doi="10.1136/neurintsurg-2014-011156"><div class="cit-metadata"><ol class="cit-auth-list"><li>
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</li><li><span class="cit-auth"><span class="cit-name-surname">Chokshi</span>  <span class="cit-name-given-names">FH</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Tu</span>  <span class="cit-name-given-names">RK</span></span>, </li><li><span class="cit-auth"><span class="cit-name-surname">Nicola</span>  <span class="cit-name-given-names">GN</span></span>, <span class="cit-etal">et al</span></li></ol><cite>. <span class="cit-article-title">Myelography CPT coding updates: effects of 4 new codes and unintended consequences</span>. <abbr class="cit-jnl-abbrev">AJNR Am J Neuroradiol</abbr> <span class="cit-pub-date">2016</span>;<span class="cit-vol">37</span>:<span class="cit-fpage">997</span>–<span class="cit-lpage">99</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.A4666</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>26744447</span></cite></div><div class="cit-extra"><a href="/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6NDoiYWpuciI7czo1OiJyZXNpZCI7czo4OiIzNy82Lzk5NyI7czo0OiJhdG9tIjtzOjIxOiIvYWpuci8zNy8xMS8xOTcyLmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==" 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">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-web" id="cit-37.11.1972.19"><div class="cit-metadata"><cite><span class="cit-auth cit-collab">License for Use of Physicians' Current Procedural Terminology, Fourth Edition (CPT)</span>. <span class="cit-article-title">Services CfMaM</span>. <span class="cit-comment"><a href="http://www.cms.gov/medicare-coverage-database/details/lcd-details.aspx">http://www.cms.gov/medicare-coverage-database/details/lcd-details.aspx</a>. Accessed March 15, 2016</span>. </cite></div><div class="cit-extra"></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-book" id="cit-37.11.1972.20"><div class="cit-metadata"><cite><span class="cit-auth cit-collab">American Medical Association</span>. <span class="cit-source">2016 AMA CPT® Professional Edition Book</span>. <span class="cit-publ-loc">Chicago</span>: <span class="cit-publ-name">American Medical Association</span>; <span class="cit-pub-date">2016</span></cite></div><div class="cit-extra"></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-book" id="cit-37.11.1972.21"><div class="cit-metadata"><cite><span class="cit-auth cit-collab">American Medical Association</span>. <span class="cit-source">Coding Update: Percutaneous Vertebroplasty and Vertebral Augmentation</span>. <span class="cit-vol">Vol 1</span>. <span class="cit-publ-loc">Chicago</span>: <span class="cit-publ-name">American Medical Association</span>; <span class="cit-pub-date">2015</span></cite></div><div class="cit-extra"></div></div></li></ol></div></div>  </div>

  
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        	<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 11 </span><div  class="highwire-cite-metadata-pubdate highwire-cite-metadata">1 Nov 2016 </div></div>
      
      
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    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0"><span class="nlm-given-names">T.M.</span> <span class="nlm-surname">Leslie-Mazwi</span></span>, <span class="highwire-citation-author" data-delta="1"><span class="nlm-given-names">J.A.</span> <span class="nlm-surname">Bello</span></span>, <span class="highwire-citation-author" data-delta="2"><span class="nlm-given-names">R.</span> <span class="nlm-surname">Tu</span></span>, <span class="highwire-citation-author" data-delta="3"><span class="nlm-given-names">G.N.</span> <span class="nlm-surname">Nicola</span></span>, <span class="highwire-citation-author" data-delta="4"><span class="nlm-given-names">W.D.</span> <span class="nlm-surname">Donovan</span></span>, <span class="highwire-citation-author" data-delta="5"><span class="nlm-given-names">R.M.</span> <span class="nlm-surname">Barr</span></span>, <span class="highwire-citation-author" data-delta="6"><span class="nlm-given-names">J.A.</span> <span class="nlm-surname">Hirsch</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">Nov 2016, </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">37 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(11) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">1972-1976; </span><span  class="highwire-cite-metadata-doi highwire-cite-metadata"><span class="label">DOI:</span> 10.3174/ajnr.A4863 </span></div>
  
  
  
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      <div class="highwire-cite-title">Current Procedural Terminology: History, Structure, and Relationship to Valuation for the Neuroradiologist</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">T.M.</span> <span class="nlm-surname">Leslie-Mazwi</span></span>, <span class="highwire-citation-author" data-delta="1"><span class="nlm-given-names">J.A.</span> <span class="nlm-surname">Bello</span></span>, <span class="highwire-citation-author" data-delta="2"><span class="nlm-given-names">R.</span> <span class="nlm-surname">Tu</span></span>, <span class="highwire-citation-author" data-delta="3"><span class="nlm-given-names">G.N.</span> <span class="nlm-surname">Nicola</span></span>, <span class="highwire-citation-author" data-delta="4"><span class="nlm-given-names">W.D.</span> <span class="nlm-surname">Donovan</span></span>, <span class="highwire-citation-author" data-delta="5"><span class="nlm-given-names">R.M.</span> <span class="nlm-surname">Barr</span></span>, <span class="highwire-citation-author" data-delta="6"><span class="nlm-given-names">J.A.</span> <span class="nlm-surname">Hirsch</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">Nov 2016, </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">37 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(11) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">1972-1976; </span><span  class="highwire-cite-metadata-doi highwire-cite-metadata"><span class="label">DOI:</span> 10.3174/ajnr.A4863 </span></div>
  
  
  
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