基于子波分解计算散射子平均间距的倒谱法  

Estimation Mean-scatterer Spacing of Tissues Scatterer Based on Wavelets Decomposition Cepstrum

作　　者：他得安[1] 陈启敏[2] 刘镇清[1] 

机构地区：[1]同济大学声学研究所,上海200092 [2]陕西师范大学应用声学研究所,陕西西安710062

出　　处：《同济大学学报（自然科学版）》2000年第5期621-625,共5页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金!资助项目 ( 1 9574 0 39)

摘　　要：提出了一种对超声散射信号分析的新方法———子波分解 (WD)倒谱法 ,并利用该方法对正常猪肝组织的回波信号进行了分析 ,对软组织中散射子的平均间距进行了估计 ,与用AR倒谱法所得结果进行了比较 ,结果表明 :WD倒谱比AR倒谱更能反映软组织的微观结构特征 。A new analysing method for ultrasonic scattered signals based on wavelets decomposition before cepstrum (WD cepstrum) has been developed. Then apply it to process the backscattered signals of normal pig liver in vitro , the mean scatterer spacing (MSS) has been estimated, and the results have compared with AR cepstrum, which shows that the WD cepstrum is more effective to reflect the microstructure feature of tissue. The results also illustrate that WD cepstrum is the effective method for signal analysis of ultrasonic scattering and characterization of tissue scatterers.

关 键 词：WD倒谱 AR倒谱 肝组织 平均间距 超声散射 

分 类 号：R445.1[医药卫生—影像医学与核医学]