Peters K J, Waag R C
Department of Radiology, University of Rochester Medical Center, New York 14627.
J Acoust Soc Am. 1988 Jul;84(1):392-9. doi: 10.1121/1.396942.
A linear model of an ultrasonic pulse-echo system is used to express the measured power spectrum as the product of a scattering medium power spectrum and a transfer function accounting for system effects. Transfer functions are experimentally determined for multiple ranges using a random medium reference. Measured power spectra normalized by these functions are shown to be in close agreement with theoretical power spectra both in shape and absolute magnitude. The results indicate that the model allows scattering media to be distinguished when the media backscatter characteristics differ in the bandwidth of the measurement system.
超声脉冲回波系统的线性模型用于将测量的功率谱表示为散射介质功率谱与考虑系统效应的传递函数的乘积。使用随机介质参考，通过实验确定多个距离的传递函数。用这些函数归一化后的测量功率谱在形状和绝对值上均与理论功率谱高度吻合。结果表明，当散射介质的后向散射特性在测量系统带宽内存在差异时，该模型能够区分这些散射介质。
