Duplex scanning in vascular disorders
نویسندگان
چکیده
منابع مشابه
Duplex scanning in extracranial vertebral artery dissection.
Ultrasonic (duplex scanning and continuous-wave Doppler) and angiographic findings in three patients with bilateral extracranial vertebral artery dissection are reported. A pattern of ultrasonic anomalies diagnostic of dissection is described, including association of a localized increase in diameter of the artery with hemodynamic signs of stenosis or occlusion at the same level and decreased p...
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When scanning a page with printing on both sides, the printing on the back-side often shows through in the scan of the front-side because the page is not completely opaque. This phenomenon of show-through is analyzed and an image processing method for removal of this commonly encountered degradation is developed. A simplified mathematical model is obtained from first physical principles. The mo...
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Introduction Duplex ultrasound has become the first line of investigation for the autogenous arterio-venous hemodialysis fistula (aAVF). In recent work published by our group, we showed that duplex ultrasound was as accurate as fistulography in the assessment of fistula stenoses. The emergence of duplex ultrasound as the primary tool for examination of the aAVF is the result of better technolog...
متن کاملDuplex scanning of normal vertebral arteries.
Vertebral arteries were studied by Duplex scanning in 50 normal subjects. Pretransverse and C6-C5, C5-C4 intertransverse segments were visualized in all cases on both sides; segment C4-C3 was visualized in 100% of the cases on the right side and in 90% on the left; ostium was obtained in 94% of the cases on the right and in 60% on the left. The left vertebral artery was dominant in 48% of the c...
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Background and Purpose—Clinical studies currently in progress are using subjective methods to characterize plaque morphology from ultrasound images. However, there are few studies on the intraobserver and interobserver variability of these classifications. This study was designed to assess these variables. Methods—Grading of plaque morphology from ultrasound images, stored both digitally and to...
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ژورنال
عنوان ژورنال: Medical Journal Armed Forces India
سال: 2004
ISSN: 0377-1237
DOI: 10.1016/s0377-1237(04)80081-9