[Analysis of ultrasonic backscattering microstructure feature of human spleen based on "WD cepstrum"]

A new method "WD cepstrum" for analysing ultrasonic scattered signals based on wavelets decomposition before cepstrum has been developed and then applied to process the backscattered signals of normal and pathological human spleen in vitro. The mean scatterer spacing(MSS) has been estimated. The results show that the MSS data of the two tissues are quite different and "WD cepstrum" is more effective for reflecting the microstructure feature of tissue. The results also illustrate that "WD cepstrum" is an effective method for signal analysis of ultrasonic scattering and characterization of tissue scatterers.