Ultrasonic pulse waves in cancellous bone analyzed by finite-difference time-domain methods

被引：22
|
作者：
Hosokawa, A. [1 ]
机构：
[1] Akashi Natl Coll Technol, Dept Elect & Comp Engn, Akashi, Hyogo 6748501, Japan
来源：
ULTRASONICS | 2006年 / 44卷
关键词：
cancellous bone; trabecular structure; viscoelastic FDTD method; Biot's FDTD method;
D O I：
10.1016/j.ultras.2006.06.020
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
The trabecular frame of cancellous bone has a high degree of porosity, anisotropy and inhomogeneity. The propagation of ultrasonic waves in cancellous bone is significantly affected by the trabecular structure. In this paper, two two-dimensional finite-difference time-domain (FDTD) methods, which were the popular viscoelastic FDTD method for a viscoelastic medium and Biot's FDTD method for a fluid-saturated porous medium, have been applied to numerically analyze the ultrasonic pulse waves propagating through bovine cancellous bone in the directions parallel and perpendicular to the trabecular alignment. The Biot's fast and slow longitudinal waves, which were identified in previous experiments for the propagation parallel to the trabecular orientation, could be analyzed using Biot's FDTD method rather than the viscoelastic FDTD method. For the single wave propagation in the perpendicular direction, on the other hand, the viscoelastic FDTD result was found to be in more good agreement with the experimental result. (c) 2006 Elsevier B. V. All rights reserved.
引用
收藏
页码：E227 / E231
页数：5
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