分数维调制Z轴的声谱图及其包络的提取  

The sonogram modulated in Z axis by the fractal and the extraction of its envelope

作　　者：仪艳华[1] 吴晓峰[1] 汪源源[1] 王威琪[1] 

机构地区：[1]复旦大学电子工程系

出　　处：《复旦学报（自然科学版）》1996年第1期62-68,共7页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金

摘　　要：在分形理论的基础上，对多普勒声谱图进行了分数维分析，首次提出了以多普勒信号的分数维为Ｚ轴调制的声谱图，并应用于提取多普勒信号中的最大频移（最大速度），对这种新方法的优缺点也进行了探讨．The fractal anylysis of Doppler sonogram based on fractal theory was made,and the sonogram modulated in Z axis by the fractal of Doppler signals was developed the first time,which was applied to extract the maximum Doppler frequency shift(corresponding the maximum of velocity). The advantages and disadvantages of this new method was also reported in the paper.

关 键 词：血流 分数维 声谱图 多普勒 超声波诊断 包络 

分 类 号：R445.1[医药卫生—影像医学与核医学]