Effects of atherosclerotic lesions on ultrasonic beam and cw doppler signals
作者:
K. K. Shung Phd,
D. Y. Fei Bsee,
M. A. Bronez Bse,
期刊:
Journal of Clinical Ultrasound
(WILEY Available online 1985)
卷期:
Volume 13,
issue 1
页码: 11-18
ISSN:0091-2751
年代: 1985
DOI:10.1002/jcu.1870130104
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: Doppler;Atherosclerosis Beam distortion
数据来源: WILEY
摘要:
AbstractDoppler ultrasound has been shown to be a useful clinical tool in the noninvasive detection of vascular stenoses, occlusion, or plaques. The presence of atherosclerotic lesions in blood vessel walls can distort the Doppler ultrasonic signal, producing inverted or biphasic tracings. This observation, in fact, has been used frequently as a criterion for the diagnosis of plaque formation and calcification of these lesions. To define the source of this distortion, we have examined the effects of various types of atherosclerotic lesions on the transmitted ultrasonic beam generated by a continuous wave (CW) Doppler ultrasonic probe. These results are compared to the Doppler flow tracings obtained by a CW ultrasonic Doppler flowmeter from blood vessels with overlaying lesions in a mock flow system. It is concluded that severe distortion in the form of beam refraction or diffraction can be produced by calcified lesions, resulting in biphasic or inverted flow signals.
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