Diagnostics and characterisation of preocclusive stenoses and occlusions of the internal carotid artery with B-flow |
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Authors: | E M Jung R Kubale G Ritter M T Gallegos K -P Jungius N Rupp D -A Clevert |
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Institution: | (1) Department of Diagnostic and Interventional Radiology, Klinikum Passau, Innstrasse 76, 94032 Passau, Germany;(2) Department of Diagnostic Radiology, Pirmasens, Germany;(3) Department of Mathematics and Computer Science, University of Passau, Passau, Germany;(4) Departement of Diagnostic Radiology, Spitalzentrum Oberwallis, Brig, Switzerland;(5) Department of Clinical Radiology, University of Munich - Campus Grosshadern, Munich, Germany |
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Abstract: | The purpose was to evaluate whether B-flow can improve the ultrasonographic diagnosis of preocclusive stenosis and occlusion
of the internal carotid artery (ICA) compared with colour-coded Doppler and power Doppler. Ninety patients with occlusions
or preocclusive stenoses of the ICA suspected by Doppler sonography were examined with B-flow in comparison with colour-coded
Doppler sonography (CCDS), power Doppler (PD) and intra-arterial digital subtraction angiography (DSA). Intrastenotic flow
detection and lengths of stenoses were the main criteria. Ulcerated plaques found by surgery in 42/90 patients were compared
by ultrasonography (US). Diagnosis of ICA occlusion with CCDS, PD and B-flow was correct in all 42 cases. A preocclusive ICA
stenosis in DSA was detected correctly in all 48/48 cases (100%) for B-flow, in 44/48 (92%) for PD and in 39/48 (81%) for
CCDS. Surgical findings showed in 17/42 cases ulcerated plaques; 15/17 (89%) of these cases were detected with B-flow, 12/17
(71%) with PD, 10/17 (59%) with CCDS, and 8/17 (47%) with DSA. With B-flow the extent of stenosis was appraised more precisely
than with PD and CCDS (P<0.0001). In conclusion, B-flow is a reliable method for preocclusive stenosis of the ICA with less intrastenotic flow artefacts.
B-flow facilitates the characterization of plaque morphologies. |
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Keywords: | Preocclusive ICA stenoses B-flow Power Doppler Colour-coded duplex sonography |
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