非均匀结构软组织冲激响应估计方法模拟研究

A estimation method simulation of impulse response of inhomogeneous medium

传统的超声解卷积的方法，是从测量信号中去掉测量系统冲激响应的影响，从而恢复实际回波信号．对于通过解卷恢复非均匀结构软组织深部散射源的散射信号，非均匀声程介质冲激响应的估计就成为关键．笔者从改进的传输模型出发，利用维纳逆滤波方法，逐层估计出组织中非均匀声程介质的冲激响应．

Traditional ultrasonic deconvolution methods estimate echo signal through removing the interference of measure system from the actul measured data. As for the deconvolution method used in estimation of actul scattered signal of deep scatterer in inhomogeneous soft tissue, the impulse response of transmission medium is a key problem. This paper presents a method based on improved transmission model to iteratively estimate the impulse response of transmission medium using Wiener invers filter technique, and computer simulation has proved that this method is feasible .