基于改进对数频谱差方法的超声衰减成像  

Ultrasonic attenuation imaging based on an improved spectral difference method

作　　者：宋健[1] 祝海江[1] 

机构地区：[1]北京化工大学信息科学与技术学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2015年第1期113-117,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家科技支撑计划(2011BAI02B03);北京化工大学"可视媒体计算"交叉学科项目

摘　　要：给出了一种基于改进对数频谱差算法的超声衰减成像方法。不同于对数频谱差算法中以扫描数据包络信号的极值点进行数据分割,该方法先估计扫描回波数据与发射波的相关系数,并把其作为特征参量来对扫描数据进行分割。制备了3个含不同衰减粒子的仿组织模块,并测量其衰减系数,实验结果验证了本文方法是可行的。最后对仿组织模块进行超声衰减成像,得到的模块衰减图像进一步验证了本文方法的准确性。An improved spectral difference method for ultrasound attenuation imaging is presented in this paper. Instead of fragmenting the data from the extremity,the improved method takes the estimated cross-correlation coefficient as the featured parameter and segments the scanned data. Three tissue-mimicking material samples containing different attenuation particles were prepared. The attenuation of each sample was measured. A good agreement between the estimated attenuation coefficients and the known reference values was obtained. In addition,the attenuation images of one sample were acquired and validate the improved method.

关 键 词：超声衰减系数 相关系数 仿组织材料 衰减成像 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]