脉冲多普勒信号的模拟方法  

The simulation method of pulsed Doppler signal

作　　者：汪源源[1] Fish,PJ 

机构地区：[1]复旦大学电子工程系

出　　处：《复旦学报（自然科学版）》1995年第3期241-246,共6页Journal of Fudan University：Natural Science

基　　金：英国SERC基金

摘　　要：脉冲多普勒技术已经成为医学临床无损检测血流的一种有效手段．利用计算机模拟的脉冲多普勒信号，可以为各种脉冲多普勒信号处理方法的研究提供信号源，从而了解各种不同处理方法的性能．文中提出一种脉冲多普勒信号的模拟方法，它可以从信号的平均频率曲线和频谱带宽出发，合成正常血流和异常血流下的脉冲多普勒信号，为从脉冲多普勒信号研究血流中的湍流和涡流提供了便利．Pulsed Doppler ultrasound has become a valuable tool in the noninvasive measurement of flow in the medical clinic. Pulsed Doppler signals simulated in computer can be used as the signal resource in the research of pulsed Doppler signal processing,which can make it possible to compare the perfomance of different processing methods.A simulation method of pulsed Doppler signal is described in this paper. This simulation model is based on the mean frequency waveform of pulsed Doppler signal and the bandwidth of signal spectrum. Pulsed Doppler signals of normal flow and abnormal flow can be generated according to this model, which makes it easier to analyse the turbulence and vortex of flow from its pulsed Doppler signal.

关 键 词：脉冲多普勒 超声多普勒 计算机模拟 血流 检测 

分 类 号：R445.1[医药卫生—影像医学与核医学]