组织后向散射的分析方法。

Methods of analysis for backscattering from tissues.

作者信息

de Billy M, Quentin G J

出版信息

Ultrasonics. 1979 Mar;17(2):85-91. doi: 10.1016/0041-624x(79)90102-1.

Abstract

Two techniques for tissue characterization by ultrasonic analysis are described. In the first, using narrow-band pulses, the angular variation I (theta) of the ultrasonic intensity back-scattered by vegetal or animal targets is analysed. We examine how it is possible to estimate the surface roughness and the average spatial periodicity d characteristic of the tissues, by calculating the Fourier transform or the autocorrelation function of I (theta). In the second technique the sample is insonified with a broadband pulse at a fixed angle. A value of the mean periodicity can be obtained directly from the frequency spectrum of the echo for tissues of fairly regular structure.

摘要

描述了两种通过超声分析进行组织特征描述的技术。第一种技术是使用窄带脉冲，分析植物或动物目标反向散射的超声强度的角度变化I(θ)。我们研究了如何通过计算I(θ)的傅里叶变换或自相关函数来估计组织的表面粗糙度和特征平均空间周期性d。在第二种技术中，用固定角度的宽带脉冲对样品进行超声照射。对于结构相当规则的组织，可以直接从回波的频谱中获得平均周期性的值。