宽带超声衰减对松质骨弹性各向异性的依赖性。

Dependence of broadband ultrasound attenuation on the elastic anisotropy of trabecular bone.

作者信息

Han S M, Rho J Y

机构信息

School of Mechanical Engineering, Pusan National University, South Korea.

出版信息

Proc Inst Mech Eng H. 1998;212(3):223-7. doi: 10.1243/0954411981534006.

DOI:10.1243/0954411981534006

PMID:9695641

Abstract

The effect of trabecular elastic anisotropy on broadband ultrasound attenuation (BUA) and bone mineral density (BMD) was investigated with human and bovine cubic cancellous bones. Ultrasonic parameters describing trabecular anisotropy were found from the three orthogonal ultrasound velocities. BMD was measured using quantitative computed tomography. Three elastic anisotropy ratios were compared to BUA in all three directions and to BMD. The combined effect of anisotropic characteristics and BMD was also correlated with BUA. The results showed that the anisotropy ratios were significantly related to BUA (p < 0.05). There was, however, no correlation between BMD and the elastic anisotropy ratios. The combination of BMD and the anisotropy produced a significantly enhanced relationship with BUA.

摘要

利用人体和牛的立方体松质骨研究了小梁弹性各向异性对宽带超声衰减（BUA）和骨矿物质密度（BMD）的影响。从三个正交超声速度中得出描述小梁各向异性的超声参数。使用定量计算机断层扫描测量骨矿物质密度。将三个弹性各向异性比在所有三个方向上与BUA以及与骨矿物质密度进行比较。各向异性特征和骨矿物质密度的综合效应也与BUA相关。结果表明，各向异性比与BUA显著相关（p < 0.05）。然而，骨矿物质密度与弹性各向异性比之间没有相关性。骨矿物质密度和各向异性的组合与BUA产生了显著增强的关系。