Abstract
Duplex ultrasound (DUS) and computed tomography angiography (CTA) are both used as first-line noninvasive methods to investigate patients for internal carotid artery (ICA) disease. Although manual assessment of CTA is well established, semiautomated vessel analysis programs have yet to prove their clinical benefit. We compared one such vessel analysis program (TeraRecon, Foster City, Calif) with DUS. A total of 85 arteries in 50 patients (35 men, 15 women; mean age, 73 ± 10 years) were eligible for comparison with the North American Symptomatic Carotid Endarterectomy Trial method. Duplex scanning comprised stenosis estimation based on (1) the intrastenotic and distal ICA diameter measurements on color-coded imaging (CCI), (2) the application of German Society for Ultrasound in Medicine (DEGUM) criteria (intrastenotic peak systolic velocity [PSV] ≥ 2 00 cm/s indicates 50% stenosis; intrastenotic PSV ≥ 300 cm/s together with a PSV of ≥ 50 cm/s in the distal ICA indicates 70% stenosis), and (3) the application of the University of Washington stenosis criteria (≥ 50% stenosis is indicated by PSV >125 cm/s and end-diastolic velocity <140 cm/s; ≥ 80% stenosis is indicated by PSV >125 cm/s and end-diastolic velocity ≥ 140 cm/s). The m...Continue Reading
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