The pulsed wave Doppler (PW Doppler) sends short pulses of ultrasound and analyzes reflected sound waves between the pulses. This is accomplished by using the same piezoelectric …

频谱多普勒超声心动图分为脉冲多普勒（pulsedwaveDoppler,PW）和连续多普勒（continuouswaveDoppler，CW）两种。 频谱多普勒对血流的探测不是直观的，通过频谱的 …

Doppler ultrasonography is medical ultrasonography that employs the Doppler effect to perform imaging of the movement of tissues and body fluids (usually blood), [1] [2] and their relative …

多普勒超声检查 是一種利用 多普勒效应 对 组织 和 体液 （通常是血液）的运动以及 组织 和 體液 与 超声换能器 之間的相对速度进行成像的 医学超声检查 [1]。 多普勒超声大大提高了医学超 …

Pulsed wave (PW) Doppler uses the Doppler principle that moving objects change the characteristic of sound waves. By sending short and quick pulses of sound, it becomes …

2020年6月10日 · 频谱多普勒显示随时间推移返回的多普勒频率范围并以超声图显示。 容器壁电阻的差异会产生不同的光谱轨迹。 血管壁的特性可以用电阻指数（RI）和脉动指数（PI）来表 …

modalities: pulsed wave (PW) Doppler, continuous wave (CW) Doppler,and color Doppler imaging.PW Doppler measures flow velocity within a specific site (or sample volume) but is …

PW stands for pulsed wave Doppler and CW for continuous wave Doppler. They are both forms of spectral Doppler and have important differences and use. PW allows us to measure blood …

2022年1月1日 · Pulsed wave (PW) Doppler ultrasound is a common, non-invasive clinical diagnostic technique for obtaining qualitative and quantitative, real-time information on blood …

The velocity of blood flow can be measured using spectral Doppler. As pulsed wave (PW) Doppler allows for measurement of velocity at a specific point in the vessel (ie, range resolution), it is …