超声多普勒血流测量中通道间交扰的软件校正方法

The Software Method for Cross-talk Correction in Ultrasound Doppler Blood Flow Measurement

超声血流速度测量中通道间的幅度和相位误差会造成镜像假血流速度信号的出现 ,这种通道间的交扰会导致错误的医学诊断结果。为了消除通道间交扰的影响 ,我们提出了超声多普勒血流测量中通道间交扰的软件校正方法。该方法通过信号相关处理技术获取通道间的幅度和相位误差 ,并将获得的幅度和相位误差用于原始血流信号的校正。仿真实验结果证明 :我们提出的方法能够较好地实现超声多普勒血流速度测量中通道间交扰的校正。与传统的硬件校正方法相比较 ,软件方法具有较大的灵活性 ,减少了仪器制作中器件筛选与线路调试的工作量 ,是一种有发展前途的新方法。

The cross talk in ultrasound Doppler measurement will lead to wrong decision in clinical diagnosis. In order to reduce cross talk, the software method for cross talk correction was presented in this paper. The cross talk error was obtained by signal correlation technique first,the correction for blood flow signal was then realized. Simulation results prove that the software method can be used to correct cross talk error well. It is a promising method.