A two-dimensional finite difference model of shear wave propagation in anisotropic soft tissue

Author

Yiqun Yang ; Urban, Matthew ; McGough, Robert J.

Author_Institution

Electr. & Comput. Eng., Michigan State Univ., East Lansing, MI, USA

fYear

2014

fDate

3-6 Sept. 2014

Firstpage

2323

Lastpage

2326

Abstract

A rotated-staggered grid finite difference algorithm solves the stiff problem that occurs in conventional grid finite difference calculations when simulating elastic wave propagation in anisotropic soft tissue. The grid is formed by rotated rectangles with displacement values on the vertices. In addition, the strain values are located at the center of each mesh cell. Simulations of elastic wave propagation using the rotated-staggered grid scheme are performed in transversely isotropic media, and the results show that the rotated-staggered grid scheme is effective for soft tissue, which has a relatively large bulk-to-shear wave speed ratio.

Keywords

acoustic wave propagation; acoustic wave velocity; bioacoustics; biological tissues; finite difference methods; anisotropic soft tissue; bulk-to-shear wave speed ratio; elastic wave propagation; mesh cell; rotated-staggered grid finite difference algorithm; shear wave propagation; strain; transversely isotropic media; two-dimensional finite difference model; Acoustics; Biological system modeling; Biological tissues; Computational modeling; Media; Propagation; Stress;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2014 IEEE International

Conference_Location

Chicago, IL

Type

conf

DOI

10.1109/ULTSYM.2014.0579

Filename

6932322