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<meta name="DC.Title" content="Potential of CT angiography in acute ischemic stroke." />
<meta name="DC.Date" content="1997-06-01" />
<meta name="DC.Publisher" content="American Journal of Neuroradiology" />
<meta name="DC.Rights" content="Copyright © American Society of Neuroradiology" />
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<meta name="DC.Description" content="PURPOSE To study the ability of CT angiography to show intracranial arterial occlusion and collateral blood flow in patients with acute stroke.

METHODS Twenty-one patients with acute nonhemorrhagic stroke were studied prospectively with conventional CT, CT angiography, and digital subtraction angiography. On the basis of CT angiographic findings, two neuroradiologists independently assessed the site of arterial occlusion, the contrast enhancement in arterial branches beyond the occlusion as a measure of collateral blood supply, and the extent of diminished parenchymal enhancement; they then predicted the extent of ischemic infarction.

RESULTS Both raters correctly assessed all trunk occlusions of the basilar artery (n = 4), the internal carotid artery (n = 4), and the middle cerebral artery (n = 9). The chance adjusted interrater agreement was kappa = .78. The assessment of branch occlusions of the middle cerebral artery was less reliable. The agreement rate in judging the collateral state in 17 occlusions in the anterior cerebral circulation was 88%. The size of 21 (62%) of 34 hemispheric infarctions was predicted correctly.

CONCLUSION CT angiography quickly and reliably adds important information to conventional CT studies in cases of acute ischemic stroke. It shows the site of occlusion, the length of the occluded arterial segment, and the contrast-enhanced arteries beyond the occlusion as an estimate of collateral blood flow." />
<meta name="DC.Contributor" content="M Knauth" />
<meta name="DC.Contributor" content="R von Kummer" />
<meta name="DC.Contributor" content="O Jansen" />
<meta name="DC.Contributor" content="S Hähnel" />
<meta name="DC.Contributor" content="A Dörfler" />
<meta name="DC.Contributor" content="K Sartor" />
<meta name="article:published_time" content="1997-06-01" />
<meta name="citation_title" content="Potential of CT angiography in acute ischemic stroke." />
<meta name="citation_abstract" lang="en" content="&lt;h3&gt;PURPOSE&lt;/h3&gt;
&lt;p&gt;To study the ability of CT angiography to show intracranial arterial occlusion and collateral blood flow in patients with acute stroke.&lt;/p&gt;&lt;h3&gt;METHODS&lt;/h3&gt;
&lt;p&gt;Twenty-one patients with acute nonhemorrhagic stroke were studied prospectively with conventional CT, CT angiography, and digital subtraction angiography. On the basis of CT angiographic findings, two neuroradiologists independently assessed the site of arterial occlusion, the contrast enhancement in arterial branches beyond the occlusion as a measure of collateral blood supply, and the extent of diminished parenchymal enhancement; they then predicted the extent of ischemic infarction.&lt;/p&gt;&lt;h3&gt;RESULTS&lt;/h3&gt;
&lt;p&gt;Both raters correctly assessed all trunk occlusions of the basilar artery (n = 4), the internal carotid artery (n = 4), and the middle cerebral artery (n = 9). The chance adjusted interrater agreement was kappa = .78. The assessment of branch occlusions of the middle cerebral artery was less reliable. The agreement rate in judging the collateral state in 17 occlusions in the anterior cerebral circulation was 88%. The size of 21 (62%) of 34 hemispheric infarctions was predicted correctly.&lt;/p&gt;&lt;h3&gt;CONCLUSION&lt;/h3&gt;
&lt;p&gt;CT angiography quickly and reliably adds important information to conventional CT studies in cases of acute ischemic stroke. It shows the site of occlusion, the length of the occluded arterial segment, and the contrast-enhanced arteries beyond the occlusion as an estimate of collateral blood flow.&lt;/p&gt;" />
<meta name="citation_journal_title" content="American Journal of Neuroradiology" />
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<meta name="citation_author" content="M Knauth" />
<meta name="citation_author" content="R von Kummer" />
<meta name="citation_author" content="O Jansen" />
<meta name="citation_author" content="S Hähnel" />
<meta name="citation_author" content="A Dörfler" />
<meta name="citation_author" content="K Sartor" />
<meta name="twitter:title" content="Potential of CT angiography in acute ischemic stroke." />
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<meta name="twitter:description" content="PURPOSE To study the ability of CT angiography to show intracranial arterial occlusion and collateral blood flow in patients with acute stroke.

METHODS Twenty-one patients with acute nonhemorrhagic stroke were studied prospectively with conventional CT, CT angiography, and digital subtraction angiography. On the basis of CT angiographic findings, two neuroradiologists independently assessed the site of arterial occlusion, the contrast enhancement in arterial branches beyond the occlusion as a measure of collateral blood supply, and the extent of diminished parenchymal enhancement; they then predicted the extent of ischemic infarction.

RESULTS Both raters correctly assessed all trunk occlusions of the basilar artery (n = 4), the internal carotid artery (n = 4), and the middle cerebral artery (n = 9). The chance adjusted interrater agreement was kappa = .78. The assessment of branch occlusions of the middle cerebral artery was less reliable. The agreement rate in judging the collateral state in 17 occlusions in the anterior cerebral circulation was 88%. The size of 21 (62%) of 34 hemispheric infarctions was predicted correctly.

CONCLUSION CT angiography quickly and reliably adds important information to conventional CT studies in cases of acute ischemic stroke. It shows the site of occlusion, the length of the occluded arterial segment, and the contrast-enhanced arteries beyond the occlusion as an estimate of collateral blood flow." />
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<meta name="og-description" property="og:description" content="PURPOSE To study the ability of CT angiography to show intracranial arterial occlusion and collateral blood flow in patients with acute stroke.

METHODS Twenty-one patients with acute nonhemorrhagic stroke were studied prospectively with conventional CT, CT angiography, and digital subtraction angiography. On the basis of CT angiographic findings, two neuroradiologists independently assessed the site of arterial occlusion, the contrast enhancement in arterial branches beyond the occlusion as a measure of collateral blood supply, and the extent of diminished parenchymal enhancement; they then predicted the extent of ischemic infarction.

RESULTS Both raters correctly assessed all trunk occlusions of the basilar artery (n = 4), the internal carotid artery (n = 4), and the middle cerebral artery (n = 9). The chance adjusted interrater agreement was kappa = .78. The assessment of branch occlusions of the middle cerebral artery was less reliable. The agreement rate in judging the collateral state in 17 occlusions in the anterior cerebral circulation was 88%. The size of 21 (62%) of 34 hemispheric infarctions was predicted correctly.

CONCLUSION CT angiography quickly and reliably adds important information to conventional CT studies in cases of acute ischemic stroke. It shows the site of occlusion, the length of the occluded arterial segment, and the contrast-enhanced arteries beyond the occlusion as an estimate of collateral blood flow." />
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    <div class="highwire-article-citation highwire-citation-type-highwire-article node4392--5" data-node-nid="4392" id="top-node-4392--61960867881" data-pisa="ajnr;18/6/1001" data-pisa-master="ajnr;18/6/1001" data-apath="/ajnr/18/6/1001.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">Potential of CT angiography in acute ischemic stroke.</h1>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0">M Knauth</span>, <span class="highwire-citation-author" data-delta="1">R von Kummer</span>, <span class="highwire-citation-author" data-delta="2">O Jansen</span>, <span class="highwire-citation-author" data-delta="3">S Hähnel</span>, <span class="highwire-citation-author" data-delta="4">A Dörfler</span> and <span class="highwire-citation-author" data-delta="5">K Sartor</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">June 1997,  </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">18 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(6) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">1001-1010; </span></div>
  
  
  
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<div id="hw-article-author-popups-top-node-4392--61960867881" style="display: none;"><div class="author-tooltip-0"><div class="author-tooltip-name">M Knauth </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=M%2BKnauth%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=Knauth%20M&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 last"><a href="/search/author1%3AM%2BKnauth%2B" rel="nofollow" class="" data-icon-position="" data-hide-link-title="0">Search for this author on this site</a></li></ul></div><div class="author-tooltip-1"><div class="author-tooltip-name">R von Kummer </div><ul 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        	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-volume highwire-cite-metadata">Vol. 18</span>, <span  class="highwire-cite-metadata-issue highwire-cite-metadata">Issue 6 </span><div  class="highwire-cite-metadata-pubdate highwire-cite-metadata">1 Jun 1997 </div></div>
      
      
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      <div class="highwire-cite-title">Potential of CT angiography in acute ischemic stroke.</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">M</span> <span class="nlm-surname">Knauth</span></span>, <span class="highwire-citation-author" data-delta="1"><span class="nlm-given-names">R</span> <span class="nlm-surname">von Kummer</span></span>, <span class="highwire-citation-author" data-delta="2"><span class="nlm-given-names">O</span> <span class="nlm-surname">Jansen</span></span>, <span class="highwire-citation-author" data-delta="3"><span class="nlm-given-names">S</span> <span class="nlm-surname">Hähnel</span></span>, <span class="highwire-citation-author" data-delta="4"><span class="nlm-given-names">A</span> <span class="nlm-surname">Dörfler</span></span>, <span class="highwire-citation-author" data-delta="5"><span class="nlm-given-names">K</span> <span class="nlm-surname">Sartor</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">Jun 1997, </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">18 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(6) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">1001-1010; </span></div>
  
  
  
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