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Numerical and experimental study on the wave attenuation in bone--FDTD simulation of ultrasound propagation in cancellous bone.

Abstract：

:In cancellous bone, longitudinal waves often separate into fast and slow waves depending on the alignment of bone trabeculae in the propagation path. This interesting phenomenon becomes an effective tool for the diagnosis of osteoporosis because wave propagation behavior depends on the bone structure. Since the fast wave mainly propagates in trabeculae, this wave is considered to reflect the structure of trabeculae. For a new diagnosis method using the information of this fast wave, therefore, it is necessary to understand the generation mechanism and propagation behavior precisely. In this study, the generation process of fast wave was examined by numerical simulations using elastic finite-difference time-domain (FDTD) method and experimental measurements. As simulation models, three-dimensional X-ray computer tomography (CT) data of actual bone samples were used. Simulation and experimental results showed that the attenuation of fast wave was always higher in the early state of propagation, and they gradually decreased as the wave propagated in bone. This phenomenon is supposed to come from the complicated propagating paths of fast waves in cancellous bone.

journal_name

Ultrasonics

journal_title

Ultrasonics

authors

Nagatani Y,Mizuno K,Saeki T,Matsukawa M,Sakaguchi T,Hosoi H

doi

10.1016/j.ultras.2008.04.011

subject

Has Abstract

pub_date

2008-11-01 00:00:00

pages

607-12

issue

6-7

eissn

0041-624X

issn

1874-9968

pii

S0041-624X(08)00081-4

journal_volume

48

pub_type

杂志文章

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