Tractable calculation of the Green's tensor for shear wave propagation in an incompressible, transversely isotropic material.

ABSTRACT: Assessing material properties from observations of shear wave propagation following an acoustic radiation force impulse (ARFI) excitation is difficult in anisotropic materials because of the complex relations among the propagation direction, shear wave polarizations, and material symmetries. In this paper, we describe a method to calculate shear wave signals using Green's tensor methods in an incompressible, transversely isotropic (TI) material characterized by three material parameters. The Green's tensor is written as the sum of an analytic expression for the SH propagation mode, and an integral expression for the SV propagation mode that can be evaluated by interpolation within precomputed integral functions with an efficiency comparable to the evaluation of a closed-form expression. By

SUBMITTER: Rouze NC 

PROVIDER: S-EPMC7288246 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature