| Power Doppler imaging of carotid artery stenosis. Comparison with color Doppler flow imaging and angiography. | |
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MedLine Citation:
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PMID: 9341707 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND AND PURPOSE: Power Doppler imaging (PDI) is a new sonographic technique that has recently been introduced for vascular application. Since the technical principles of PDI may provide increased sensitivity to visualize the continuity of blood flow in arterial stenoses, we investigated the diagnostic significance of PDI and the intermethod relationship for the measurement and classification of internal carotid artery (ICA) stenosis in comparison with both color Doppler flow imaging (CDFI) and angiography. METHODS: One hundred patients with a total of 128 ICA stenoses (50% to 69%, n = 37; 70% to 79%, n = 27; 80% to 99%, n = 64) and 12 ICA occlusions were consecutively investigated by means of PDI, CDFI, and intra-arterial angiography (n = 48). Reduction of the intrastenotic lumen was measured on longitudinal and transverse views of PDI and CDFI for the calculation of the degree of diameter and area stenosis, respectively. Angiographic stenosis was determined with the use of the North American Symptomatic Carotid Endarterectomy Trial (NASCET), European Carotid Surgery Trial (ECST), and common carotid (CC) methods. RESULTS: PDI provided significantly more excellent or good (92% versus 79%; P < .01) displays of the intrastenotic lumen than CDFI, particularly in complicated high-grade stenosis. While linear regression analysis demonstrated a high overall correlation between PDI and CDFI for diameter (r = .88; P < .001) and area stenosis (r = .79; P < .001), categorization of ICA stenosis revealed best agreement for 80% to 99% area stenoses. Since angiography frequently either underclassified (NASCET method) or overclassified (ECST, CC methods) the degree of ICA stenosis in comparison to both PDI and CDFI, the sonographic-angiographic correlation was only moderate (regression coefficients ranged from .62 to .70; P < .001). CONCLUSIONS: PDI further improves the assessment of ICA stenosis by providing better visualization of the stenotic vascular lumen than CDFI. Sonographic imaging of the stenotic plaque on both PDI and CDFI provided a direct measurement of the local degree of stenosis, while the angiographic grade of stenosis essentially depended on the method used for evaluation. |
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Authors:
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W Steinke; S Ries; N Artemis; A Schwartz; M Hennerici |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Stroke; a journal of cerebral circulation Volume: 28 ISSN: 0039-2499 ISO Abbreviation: Stroke Publication Date: 1997 Oct |
Date Detail:
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Created Date: 1997-11-20 Completed Date: 1997-11-20 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0235266 Medline TA: Stroke Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1981-7 Citation Subset: IM |
Affiliation:
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Department of Neurology, Klinikum Mannheim, University of Heidelberg, Germany. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Aged, 80 and over Carotid Artery, Internal / radiography, ultrasonography Carotid Stenosis / radiography*, ultrasonography* Cerebral Angiography* Evaluation Studies as Topic Female Humans Male Middle Aged Ultrasonography / methods* Ultrasonography, Doppler, Color* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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