[多普勒血流信号频谱增宽的原因及影响因素]

[Causes and influential factors of spectral broadening in Doppler flow signal].

作者信息

Wen Y, Qian M, Gong X, Zhen B, Wan M

机构信息

Dept. of Biomedical Engineering, Xi'an Jiaotong University.

出版信息

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 1997 Jun;14(2):118-23.

PMID:9817638

Abstract

Signals received are the resultant of the blood flow phasors in CW Doppler system and there are spectral broadening phenomena in it, in other words, frequency of signals corresponding to a moving RBC is not single. A model is presented that enables the detailed effects of spectral broadening to be calculated for a CW Doppler system by using geometric boundary argument. Results are given for the circular geometry.

摘要

在连续波多普勒系统中接收到的信号是血流相量的合成结果，并且其中存在频谱展宽现象，也就是说，对应于一个移动红细胞的信号频率不是单一的。本文提出了一个模型，该模型通过使用几何边界论证，能够计算连续波多普勒系统频谱展宽的详细影响。给出了圆形几何结构的结果。