Quantitative estimation of bone density and bone quality using acoustic parameters of cancellous bone for fast and slow waves
Quantitative estimation of bone density and bone quality using acoustic parameters of cancellous bone for fast and slow waves
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DOI：
10.1143/jjap.44.4578
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发表时间：
2005-06-01
期刊：
影响因子：
--
通讯作者：
Otani, T
中科院分区：
文献类型：
--
作者：
Otani, T
在之前的研究中，在松质骨中观察到两种纵波，即快波和慢波。快波的传播速度随着骨密度的增加而增加，而慢波的传播速度几乎保持不变。快波的衰减常数远高于慢波，并且与骨密度无关，但慢波的衰减常数随着骨密度的增加而增大。在本研究中，超声波穿过松质骨的实验结果表明，快波振幅与骨密度成反比增加，慢波振幅与骨密度成反比减少。快波振幅对骨密度的依赖性不能用衰减常数来解释。对穿过松质骨的超声波传播路径进行建模，以指定超声波参数与骨密度之间的因果关系。然后定量地制定骨密度和骨弹性。
In previous studies, two longitudinal waves, the fast and slow waves, were observed in cancellous bone. The propagation speed of the fast wave increases with bone density and that of the slow wave remains almost constant. The attenuation constant of the fast wave is much higher than that of the slow wave and is independent of bone density, but the attenuation constant of the slow wave increases with bone density. In the present study, experimental results on ultrasonic waves transmitted through cancellous bone show that the fast wave amplitude increases proportionally and the slow wave amplitude decreases inversely with bone density. The dependence of the fast wave amplitude on bone density cannot be explained by the attenuation constant. The ultrasonic wave propagation path through cancellous bone is modeled to specify the causality between ultrasonic wave parameters and bone density. Then bone density and bone elasticity are quantitatively formulated.