{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T02:52:43Z","timestamp":1788317563204,"version":"build-2803163510"},"reference-count":28,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"7","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Stroke"],"published-print":{"date-parts":[[1999,7]]},"abstract":"<jats:p>\n            <jats:italic>Background and Purpose<\/jats:italic>\n            \u2014Our study evaluated noninvasive tests for the diagnosis of atheromatous internal carotid artery (ICA) pseudo-occlusion.\n          <\/jats:p>\n          <jats:p>\n            <jats:italic>Methods<\/jats:italic>\n            \u2014Twenty patients (17 men, 3 women; mean age \u00b1SD, 64.3\u00b111.6 years) with angiographically proven atheromatous ICA pseudo-occlusion (20 vessels) were prospectively examined with MR angiography (MRA; 2D and 3D time-of-flight techniques), color Doppler\u2013assisted duplex imaging (CDDI) and power-flow imaging (PFI) with and without an intravenous ultrasonic contrast agent. As a control group, 13 patients (13 men; mean\u00b1SD age, 63.0\u00b19.0 years) with angiographically proven ICA occlusion (13 vessels) were studied with the same techniques. For the determination of interobserver agreement (\u03ba statistics), the findings of each diagnostic technique were read by 2 blinded and independent observers who were not involved in patient recruitment and initial data acquisition. Specificity and sensitivity were calculated for all noninvasive techniques (observer consensus) in comparison to the standard of reference (intra-arterial angiography).\n          <\/jats:p>\n          <jats:p>\n            <jats:italic>Results<\/jats:italic>\n            \u2014Interobserver reliabilities were \u03ba=0.86 for intra-arterial angiography, \u03ba=0.90 for unenhanced CDDI, \u03ba=0.93 for enhanced CDDI, \u03ba=0.93 for unenhanced PFI, \u03ba=1.0 for enhanced PFI, \u03ba=0.93 for 2D MRA, and \u03ba=0.77 for 3D MRA, respectively (\n            <jats:italic>P<\/jats:italic>\n            &lt;0.0001). Specificities and sensitivities were 0.92 and 0.70 for unenhanced CDDI, 0.92 and 0.83 for enhanced CDDI, 0.92 and 0.95 for unenhanced PFI, 1.0 and 0.94 for enhanced PFI, 1.0 and 0.65 for 2D MRA, and 0.89 and 0.47 for 3D MRA, respectively.\n          <\/jats:p>\n          <jats:p>\n            <jats:italic>Conclusions<\/jats:italic>\n            \u2014Advanced ultrasonographic techniques, especially PFI (with only 1 false-positive diagnosis of occlusion in the present series), can provide reliable and valid data to differentiate between ICA pseudo-occlusion and complete occlusion. In contrast, time-of-flight MRA at its present state is not capable of predicting minimal residual flow within a nearly occluded ICA.\n          <\/jats:p>","DOI":"10.1161\/01.str.30.7.1444","type":"journal-article","created":{"date-parts":[[2011,6,17]],"date-time":"2011-06-17T20:08:03Z","timestamp":1308341283000},"page":"1444-1449","update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":91,"title":["Reliability and Validity of Noninvasive Imaging of Internal Carotid Artery Pseudo-Occlusion"],"prefix":"10.1161","volume":"30","author":[{"given":"Gu\u0308nter","family":"Fu\u0308rst","sequence":"first","affiliation":[{"name":"From the Institute of Diagnostic Radiology (G.F., A.S., F.W., J.M., M.C., A.A.) and Department of Neurology (T.N.-H., M. Schroeder), Heinrich-Heine-University Du\u0308sseldorf, and the Department of Neurology (H.S., M. Sitzer), J.W. Goethe University, Frankfurt am Main, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andreas","family":"Saleh","sequence":"additional","affiliation":[{"name":"From the Institute of Diagnostic Radiology (G.F., A.S., F.W., J.M., M.C., A.A.) and Department of Neurology (T.N.-H., M. Schroeder), Heinrich-Heine-University Du\u0308sseldorf, and the Department of Neurology (H.S., M. Sitzer), J.W. Goethe University, Frankfurt am Main, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frank","family":"Wenserski","sequence":"additional","affiliation":[{"name":"From the Institute of Diagnostic Radiology (G.F., A.S., F.W., J.M., M.C., A.A.) and Department of Neurology (T.N.-H., M. Schroeder), Heinrich-Heine-University Du\u0308sseldorf, and the Department of Neurology (H.S., M. Sitzer), J.W. Goethe University, Frankfurt am Main, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ju\u0308rgen","family":"Malms","sequence":"additional","affiliation":[{"name":"From the Institute of Diagnostic Radiology (G.F., A.S., F.W., J.M., M.C., A.A.) and Department of Neurology (T.N.-H., M. Schroeder), Heinrich-Heine-University Du\u0308sseldorf, and the Department of Neurology (H.S., M. Sitzer), J.W. Goethe University, Frankfurt am Main, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mathias","family":"Cohnen","sequence":"additional","affiliation":[{"name":"From the Institute of Diagnostic Radiology (G.F., A.S., F.W., J.M., M.C., A.A.) and Department of Neurology (T.N.-H., M. Schroeder), Heinrich-Heine-University Du\u0308sseldorf, and the Department of Neurology (H.S., M. Sitzer), J.W. Goethe University, Frankfurt am Main, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Albrecht","family":"Aulich","sequence":"additional","affiliation":[{"name":"From the Institute of Diagnostic Radiology (G.F., A.S., F.W., J.M., M.C., A.A.) and Department of Neurology (T.N.-H., M. Schroeder), Heinrich-Heine-University Du\u0308sseldorf, and the Department of Neurology (H.S., M. Sitzer), J.W. Goethe University, Frankfurt am Main, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tobias","family":"Neumann-Haefelin","sequence":"additional","affiliation":[{"name":"From the Institute of Diagnostic Radiology (G.F., A.S., F.W., J.M., M.C., A.A.) and Department of Neurology (T.N.-H., M. Schroeder), Heinrich-Heine-University Du\u0308sseldorf, and the Department of Neurology (H.S., M. Sitzer), J.W. Goethe University, Frankfurt am Main, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Schroeter","sequence":"additional","affiliation":[{"name":"From the Institute of Diagnostic Radiology (G.F., A.S., F.W., J.M., M.C., A.A.) and Department of Neurology (T.N.-H., M. Schroeder), Heinrich-Heine-University Du\u0308sseldorf, and the Department of Neurology (H.S., M. Sitzer), J.W. Goethe University, Frankfurt am Main, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Helmuth","family":"Steinmetz","sequence":"additional","affiliation":[{"name":"From the Institute of Diagnostic Radiology (G.F., A.S., F.W., J.M., M.C., A.A.) and Department of Neurology (T.N.-H., M. Schroeder), Heinrich-Heine-University Du\u0308sseldorf, and the Department of Neurology (H.S., M. Sitzer), J.W. Goethe University, Frankfurt am Main, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthias","family":"Sitzer","sequence":"additional","affiliation":[{"name":"From the Institute of Diagnostic Radiology (G.F., A.S., F.W., J.M., M.C., A.A.) and Department of Neurology (T.N.-H., M. Schroeder), Heinrich-Heine-University Du\u0308sseldorf, and the Department of Neurology (H.S., M. Sitzer), J.W. 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