超声在组织中的散射。

Scattering of ultrasound by tissues.

作者信息

Sehgal C M, Greenleaf J F

出版信息

Ultrason Imaging. 1984 Jan;6(1):60-80. doi: 10.1177/016173468400600106.

Abstract

Scattering of ultrasound by biological tissues (continuous-inhomogeneous media) is discussed. An analytical expression for the attenuation due to scattering (alpha Tsc) and backscatter coefficients (sigma T) of tissues are obtained. The results explain the variation of alpha Tsc and sigma T with frequency for a number of tissues. The study also provides two statistical parameters, velocity fluctuation coefficient and correlation length, in terms of which the scattering of tissues can be defined quantitatively.

摘要

讨论了生物组织（连续非均匀介质）对超声的散射。得到了组织散射引起的衰减（αTsc）和背向散射系数（σT）的解析表达式。结果解释了多种组织中αTsc和σT随频率的变化。该研究还提供了两个统计参数，速度波动系数和相关长度，据此可以定量定义组织的散射。