医学
颈动脉内膜切除术
放射科
狭窄
闭塞
颈动脉疾病
颈动脉
多普勒效应
金标准(测试)
血流动力学
心脏病学
物理
天文
作者
H. Tahmasebpour,Anne Buckley,P L Cooperberg,C. Fix
出处
期刊:Radiographics
[Radiological Society of North America]
日期:2005-11-01
卷期号:25 (6): 1561-1575
被引量:146
摘要
Ultrasonography (US) of the carotid arteries is a common imaging study performed for diagnosis of carotid artery disease. In the United States, carotid US may be the only diagnostic imaging modality performed before carotid endarterectomy. Therefore, the information obtained with carotid US must be reliable and reproducible. Technical parameters that can affect the accuracy of carotid US results include the Doppler angle, sample volume box, color Doppler sampling window, color velocity scale, and color gain. Important factors in diagnosis of atherosclerotic disease of the extracranial carotid arteries are the intima-media thickness, plaque morphology, criteria for grading stenosis, limiting factors such as the presence of dissection or cardiac abnormalities, distinction between near occlusion and total occlusion, and the presence of a subclavian steal. Challenges to the consistency of carotid US results may include lack of a standard protocol, poor Doppler technique, inexperience in interpretation of hemodynamic changes reflected in the Doppler waveform, artifacts, and physical challenges. Hindrances in the classification of problematic carotid artery stenoses may be overcome by following a standard protocol and optimizing scanning techniques and Doppler settings. © RSNA, 2005
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