Naili Salah, Nguyen Vu-Hieu, Vu Mai-Ba, Desceliers Christophe, Soize Christian
Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME Unité Mixte de Recherche 8208 CNRS, 61 Avenue du Général de Gaulle, 94010 Créteil Cedex, France.
Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME Unité Mixte de Recherche 8208 CNRS, 5 Boulevard Descartes, 77454 Marne la Vallée, France.
J Acoust Soc Am. 2015 Feb;137(2):668-78. doi: 10.1121/1.4906838.
The aim of this work is to evaluate the effects of the heterogeneity and anisotropy of material properties of cortical bone on its ultrasonic response obtained by using axial transmission method. The heterogeneity and anisotropy of material properties are introduced by using a parametric probabilistic model. The geometrical configuration of the tested sample is described by a tri-layer medium composed of a heterogeneous and anisotropic solid layer sandwiched between two acoustic fluid layers of which one of these layers is excited by an acoustic linear source. The numerical results focus on studying of an interest quantity, called velocity of the first arriving signal, showing that it strongly depends on the dispersion induced by statistical fluctuations of stochastic elasticity field.
这项工作的目的是评估皮质骨材料特性的非均匀性和各向异性对采用轴向传输法获得的超声响应的影响。材料特性的非均匀性和各向异性通过使用参数概率模型来引入。测试样本的几何结构由一个三层介质描述，该介质由夹在两个声学流体层之间的非均匀且各向异性的固体层组成，其中一个流体层由声学线性源激发。数值结果着重研究一个感兴趣的量，即首个到达信号的速度，结果表明它强烈依赖于随机弹性场统计波动引起的频散。
