狭窄血管内定常流多普勒信号的计算机仿真  

Simulating Doppler ultrasound signals from a steady flow in the stenosis

作　　者：张羽[1] 汪源源[1] 王威琪[1] 

机构地区：[1]复旦大学电子工程系,上海200433

出　　处：《声学学报》2003年第5期457-461,共5页Acta Acustica

基　　金：高等学校骨干教师资助计划

摘　　要：提出了一种狭窄血管内定常流多普勒血流信号的计算机仿真方法,在PC机上合成不同血流速度、狭窄血管段不同位置的多普勒信号。对这些仿真信号进行频谱分析,计算出相应的最大频率、平均频率和频谱宽度等参数。实验结果的分析验证了该仿真方法的有效性,为狭窄血管内多普勒血流信号的理解和进一步的特征提取提供了便利。A computer simulation approach was proposed for Doppler ultrasound signals from a steady flow in the stenosis. Simulated signals with various velocities at different positions along the vessel were generated on a PC. The spectral analyses were carried out for these signals. Several parameters, such as the maximum frequency, the mean frequency, and the spectral width, were calculated from the Doppler spectrum. Prom the experiment results, it was showed that this approach is valid for the Doppler signal simulation from a steady flow in the stenosis, improves the understanding of the Doppler signal from stenosis, and brings the convenience to the further feature extraction of these signals.

关 键 词：狭窄血管 定常流 多普勒信号 计算机仿真 血流信号 频谱分析 动脉血管系统 人体 临床诊断 

分 类 号：R-39[医药卫生]