Scoutt L M, Zawin M L, Taylor K J
Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, CT 06510.
Radiology. 1990 Feb;174(2):309-19. doi: 10.1148/radiology.174.2.2404310.
Duplex and color Doppler ultrasound (US) are noninvasive techniques capable of providing much information about the condition of blood vessels and flow within them throughout the body. Doppler US provides more than noninvasive angiography. Besides assessment of blood vessel patency and direction of flow, analysis of the flow velocity waveform allows quantitation of arterial stenoses and evaluation of both physiologic and pathologic changes in impedance. In certain situations, Doppler US can aid in tissue characterization and estimation of absolute flow volume. Color Doppler flow imaging may both expedite and clarify the duplex Doppler examination. In addition, color Doppler imaging can demonstrate flow orientation and improve the identification of turbulence and soft plaque. Color and duplex Doppler US are complementary, with color Doppler techniques providing spatial orientation and pulse Doppler techniques providing the time-velocity spectrum for quantitation.
双功超声和彩色多普勒超声（US）是无创技术，能够提供有关全身血管状况及其内部血流的大量信息。多普勒超声比无创血管造影提供的信息更多。除了评估血管通畅性和血流方向外，对流速波形的分析还可以对动脉狭窄进行定量，并评估阻抗的生理和病理变化。在某些情况下，多普勒超声有助于组织特征分析和绝对血流量的估计。彩色多普勒血流成像可以加快并澄清双功多普勒检查。此外，彩色多普勒成像可以显示血流方向，并改善对湍流和软斑块的识别。彩色多普勒超声和双功超声是互补的，彩色多普勒技术提供空间方向，脉冲多普勒技术提供用于定量的时间-速度频谱。
