用声波速度确定骨组织弹性参数

An ultrasonic method for measuring the elastic properties of compact bone

本文用超声方法确定密质骨的弹性特征,其基本原理是基于弹性波理论中的Christoffel方程。本文应用液浸、声波穿透技术,对牛胫骨样品中一些特殊入射方向的声波速度进行了测试,利用固体中沿任意方向的弹性波传播速度与材料的弹性系数间的关系,通过计算机编程反演出具有六方晶体对称结构的密质骨组织的5个独立弹性常数。结果与相关文献中其它方法所得结果一致。

The aim of the present study is to determine the elastic properties of bones by ultrasonic methods. The basic principles are Christoffel equation. In this paper, we use the through-transmission technique for velocity measurements at some specified angles of incidence in bovine bone. It relates the elastic constants of a material to the speed of propagation of elastic waves along arbitrary directions in the solid. The five elastic constants are deduced from the velocities measured considering the compact bone as hexagonal symmetry. The results are in line with those in the literature.