CNRS, Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, UMR 8208 CNRS, 94010 Créteil Cedex, France.
J Acoust Soc Am. 2011 Apr;129(4):EL114-20. doi: 10.1121/1.3554719.
Cortical bone is a viscoelastic heterogeneous medium which may be assessed with axial transmission. This work aims at evaluating the average depth investigated by the lateral wave for radial variations of material properties in relatively thick cortical bone. The equivalent contributing depth (ECD) is derived from the finite element simulation results for spatial variations of a viscoelastic coefficient (η(11)) and of porosity. A value of ECD equal to around 1.6 mm is obtained for a spatial variation of η(11). The method fails to predict accurate values of the ECD for a spatial variation of porosity, because all parameters vary simultaneously.
皮质骨是一种黏弹性各向异性介质，可以通过轴向透射进行评估。本工作旨在评估侧向波在相对较厚的皮质骨中探测材料性质径向变化的平均深度。等效贡献深度（ECD）是通过有限元模拟黏弹性系数（η(11)）和孔隙率空间变化的结果得出的。对于 η(11)的空间变化，ECD 值约为 1.6mm。对于孔隙率的空间变化，该方法无法准确预测 ECD 的值，因为所有参数都是同时变化的。
