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<meta name="DC.Title" content="Qualitative Assessment of Cervical Spinal Stenosis: Observer Variability on CT and MR Images" />
<meta name="DC.Date" content="2003-04-01" />
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<meta name="DC.Description" content="BACKGROUND AND PURPOSE: Several studies have been undertaken to validate quantitative methods of evaluating cervical spinal stenosis. This study was performed to assess the degree of interobserver and intraobserver agreement in the qualitative evaluation of cervical spinal stenosis on CT myelograms and MR images.

METHODS: Cervical MR images and CT myelograms of 38 patients were evaluated retrospectively. Six neuroradiologists with various backgrounds and training independently assessed the level, degree, and cause of stenosis on either MR images or CT myelograms. Unknown to the evaluators, 16 of the patients were evaluated twice to determine intraobserver variability.

RESULTS: Interobserver agreement among the radiologists with regard to level, degree, and cause of stenosis on CT myelograms showed κ values of 0.50, 0.26, and 0.32, respectively, and on MR images showed κ values of 0.60, 0.31, and 0.22, respectively. Intraobserver agreement with regard to level, degree, and cause of stenosis on CT myelograms showed mean κ values of 0.69, 0.41, and 0.55, respectively, and on MR images showed mean κ values of 0.80, 0.37, and 0.40, respectively.

CONCLUSION: MR imaging and CT myelographic evaluation of cervical spinal stenosis by using current qualitative methods results in significant variation in image interpretation." />
<meta name="DC.Contributor" content="Jeffrey S. Stafira" />
<meta name="DC.Contributor" content="Jagadeesh R. Sonnad" />
<meta name="DC.Contributor" content="William T. C. Yuh" />
<meta name="DC.Contributor" content="David R. Huard" />
<meta name="DC.Contributor" content="Robin E. Acker" />
<meta name="DC.Contributor" content="Dan L. Nguyen" />
<meta name="DC.Contributor" content="Joan E. Maley" />
<meta name="DC.Contributor" content="Faridali G. Ramji" />
<meta name="DC.Contributor" content="Wen-Bin Li" />
<meta name="DC.Contributor" content="Christopher M. Loftus" />
<meta name="article:published_time" content="2003-04-01" />
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<meta name="citation_title" content="Qualitative Assessment of Cervical Spinal Stenosis: Observer Variability on CT and MR Images" />
<meta name="citation_abstract" lang="en" content="&lt;p&gt;&lt;i&gt;BACKGROUND AND PURPOSE:&lt;/i&gt; Several studies have been undertaken to validate quantitative methods of evaluating cervical spinal stenosis. This study was performed to assess the degree of interobserver and intraobserver agreement in the qualitative evaluation of cervical spinal stenosis on CT myelograms and MR images.&lt;/p&gt;&lt;p&gt;&lt;i&gt;METHODS:&lt;/i&gt; Cervical MR images and CT myelograms of 38 patients were evaluated retrospectively. Six neuroradiologists with various backgrounds and training independently assessed the level, degree, and cause of stenosis on either MR images or CT myelograms. Unknown to the evaluators, 16 of the patients were evaluated twice to determine intraobserver variability.&lt;/p&gt;&lt;p&gt;&lt;i&gt;RESULTS:&lt;/i&gt; Interobserver agreement among the radiologists with regard to level, degree, and cause of stenosis on CT myelograms showed κ values of 0.50, 0.26, and 0.32, respectively, and on MR images showed κ values of 0.60, 0.31, and 0.22, respectively. Intraobserver agreement with regard to level, degree, and cause of stenosis on CT myelograms showed mean κ values of 0.69, 0.41, and 0.55, respectively, and on MR images showed mean κ values of 0.80, 0.37, and 0.40, respectively.&lt;/p&gt;&lt;p&gt;&lt;i&gt;CONCLUSION:&lt;/i&gt; MR imaging and CT myelographic evaluation of cervical spinal stenosis by using current qualitative methods results in significant variation in image interpretation.&lt;/p&gt;" />
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<meta name="citation_publication_date" content="2003/04/01" />
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<meta name="twitter:title" content="Qualitative Assessment of Cervical Spinal Stenosis: Observer Variability on CT and MR Images" />
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<meta name="twitter:description" content="BACKGROUND AND PURPOSE: Several studies have been undertaken to validate quantitative methods of evaluating cervical spinal stenosis. This study was performed to assess the degree of interobserver and intraobserver agreement in the qualitative evaluation of cervical spinal stenosis on CT myelograms and MR images.

METHODS: Cervical MR images and CT myelograms of 38 patients were evaluated retrospectively. Six neuroradiologists with various backgrounds and training independently assessed the level, degree, and cause of stenosis on either MR images or CT myelograms. Unknown to the evaluators, 16 of the patients were evaluated twice to determine intraobserver variability.

RESULTS: Interobserver agreement among the radiologists with regard to level, degree, and cause of stenosis on CT myelograms showed κ values of 0.50, 0.26, and 0.32, respectively, and on MR images showed κ values of 0.60, 0.31, and 0.22, respectively. Intraobserver agreement with regard to level, degree, and cause of stenosis on CT myelograms showed mean κ values of 0.69, 0.41, and 0.55, respectively, and on MR images showed mean κ values of 0.80, 0.37, and 0.40, respectively.

CONCLUSION: MR imaging and CT myelographic evaluation of cervical spinal stenosis by using current qualitative methods results in significant variation in image interpretation." />
<meta name="og-title" property="og:title" content="Qualitative Assessment of Cervical Spinal Stenosis: Observer Variability on CT and MR Images" />
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<meta name="og-description" property="og:description" content="BACKGROUND AND PURPOSE: Several studies have been undertaken to validate quantitative methods of evaluating cervical spinal stenosis. This study was performed to assess the degree of interobserver and intraobserver agreement in the qualitative evaluation of cervical spinal stenosis on CT myelograms and MR images.

METHODS: Cervical MR images and CT myelograms of 38 patients were evaluated retrospectively. Six neuroradiologists with various backgrounds and training independently assessed the level, degree, and cause of stenosis on either MR images or CT myelograms. Unknown to the evaluators, 16 of the patients were evaluated twice to determine intraobserver variability.

RESULTS: Interobserver agreement among the radiologists with regard to level, degree, and cause of stenosis on CT myelograms showed κ values of 0.50, 0.26, and 0.32, respectively, and on MR images showed κ values of 0.60, 0.31, and 0.22, respectively. Intraobserver agreement with regard to level, degree, and cause of stenosis on CT myelograms showed mean κ values of 0.69, 0.41, and 0.55, respectively, and on MR images showed mean κ values of 0.80, 0.37, and 0.40, respectively.

CONCLUSION: MR imaging and CT myelographic evaluation of cervical spinal stenosis by using current qualitative methods results in significant variation in image interpretation." />
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      <h1 class="highwire-cite-title" id="page-title">Qualitative Assessment of Cervical Spinal Stenosis: Observer Variability on CT and MR Images</h1>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0">Jeffrey S. Stafira</span>, <span class="highwire-citation-author" data-delta="1">Jagadeesh R. Sonnad</span>, <span class="highwire-citation-author" data-delta="2">William T. C. Yuh</span>, <span class="highwire-citation-author" data-delta="3">David R. Huard</span>, <span class="highwire-citation-author" data-delta="4">Robin E. Acker</span>, <span class="highwire-citation-author" data-delta="5">Dan L. Nguyen</span>, <span class="highwire-citation-author" data-delta="6">Joan E. Maley</span>, <span class="highwire-citation-author" data-delta="7">Faridali G. Ramji</span>, <span class="highwire-citation-author" data-delta="8">Wen-Bin Li</span> and <span class="highwire-citation-author" data-delta="9">Christopher M. Loftus</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">April 2003,  </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">24 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(4) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">766-769; </span></div>
  
  
  
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<div id="hw-article-author-popups-top-node-10773--6552029897" style="display: none;"><div class="author-tooltip-0"><div class="author-tooltip-name">Jeffrey S. 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        	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-volume highwire-cite-metadata">Vol. 24</span>, <span  class="highwire-cite-metadata-issue highwire-cite-metadata">Issue 4 </span><div  class="highwire-cite-metadata-pubdate highwire-cite-metadata">1 Apr 2003 </div></div>
      
      
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      <div class="highwire-cite-title">Qualitative Assessment of Cervical Spinal Stenosis: Observer Variability on CT and MR Images</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">Jeffrey S.</span> <span class="nlm-surname">Stafira</span></span>, <span class="highwire-citation-author" data-delta="1"><span class="nlm-given-names">Jagadeesh R.</span> <span class="nlm-surname">Sonnad</span></span>, <span class="highwire-citation-author" data-delta="2"><span class="nlm-given-names">William T. C.</span> <span class="nlm-surname">Yuh</span></span>, <span class="highwire-citation-author" data-delta="3"><span class="nlm-given-names">David R.</span> <span class="nlm-surname">Huard</span></span>, <span class="highwire-citation-author" data-delta="4"><span class="nlm-given-names">Robin E.</span> <span class="nlm-surname">Acker</span></span>, <span class="highwire-citation-author" data-delta="5"><span class="nlm-given-names">Dan L.</span> <span class="nlm-surname">Nguyen</span></span>, <span class="highwire-citation-author" data-delta="6"><span class="nlm-given-names">Joan E.</span> <span class="nlm-surname">Maley</span></span>, <span class="highwire-citation-author" data-delta="7"><span class="nlm-given-names">Faridali G.</span> <span class="nlm-surname">Ramji</span></span>, <span class="highwire-citation-author" data-delta="8"><span class="nlm-given-names">Wen-Bin</span> <span class="nlm-surname">Li</span></span>, <span class="highwire-citation-author" data-delta="9"><span class="nlm-given-names">Christopher M.</span> <span class="nlm-surname">Loftus</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">Apr 2003, </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">24 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(4) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">766-769; </span></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">Jeffrey S.</span> <span class="nlm-surname">Stafira</span></span>, <span class="highwire-citation-author" data-delta="1"><span class="nlm-given-names">Jagadeesh R.</span> <span class="nlm-surname">Sonnad</span></span>, <span class="highwire-citation-author" data-delta="2"><span class="nlm-given-names">William T. C.</span> <span class="nlm-surname">Yuh</span></span>, <span class="highwire-citation-author" data-delta="3"><span class="nlm-given-names">David R.</span> <span class="nlm-surname">Huard</span></span>, <span class="highwire-citation-author" data-delta="4"><span class="nlm-given-names">Robin E.</span> <span class="nlm-surname">Acker</span></span>, <span class="highwire-citation-author" data-delta="5"><span class="nlm-given-names">Dan L.</span> <span class="nlm-surname">Nguyen</span></span>, <span class="highwire-citation-author" data-delta="6"><span class="nlm-given-names">Joan E.</span> <span class="nlm-surname">Maley</span></span>, <span class="highwire-citation-author" data-delta="7"><span class="nlm-given-names">Faridali G.</span> <span class="nlm-surname">Ramji</span></span>, <span class="highwire-citation-author" data-delta="8"><span class="nlm-given-names">Wen-Bin</span> <span class="nlm-surname">Li</span></span>, <span class="highwire-citation-author" data-delta="9"><span class="nlm-given-names">Christopher M.</span> <span class="nlm-surname">Loftus</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">Apr 2003, </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">24 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(4) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">766-769; </span></div>
  
  
  
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