频谱展宽对连续波多普勒超声频谱的影响：一种几何方法。

Influence of spectral broadening on continuous wave Doppler ultrasound spectra: a geometric approach.

作者信息

Bascom P A, Cobbold R S, Roelofs B H

出版信息

Ultrasound Med Biol. 1986 May;12(5):387-95. doi: 10.1016/0301-5629(86)90196-1.

Abstract

A model is presented that enables the detailed effects of spectral broadening to be calculated for a continuous wave (CW) Doppler system by using geometric boundary arguments. The model assumes a uniform distribution of isotropic scatterers and treats the transmitter and receiver crystals as incremental sources and receivers. Detailed results for rectangular and circular geometries are presented in order to provide a physical understanding of the manner in which spectral broadening arises. Results are given for the circular geometry, to illustrate the manner in which the received spectrum is affected by the transducer size and distance from the vessel.

摘要

本文提出了一种模型，该模型通过使用几何边界参数，能够计算连续波（CW）多普勒系统中频谱展宽的详细影响。该模型假设各向同性散射体均匀分布，并将发射和接收晶体视为增量源和接收器。给出了矩形和圆形几何形状的详细结果，以便对频谱展宽产生的方式有一个物理上的理解。给出了圆形几何形状的结果，以说明接收频谱受换能器尺寸和与血管距离影响的方式。