Estimation of material parameters from slow and fast shear waves in an incompressible, transversely isotropic material.

ABSTRACT: This paper describes a method to estimate mechanical properties of soft, anisotropic materials from measurements of shear waves with specific polarization and propagation directions. This method is applicable to data from magnetic resonance elastography (MRE), which is a method for measuring shear waves in live subjects or in vitro samples. Here, we simulate MRE data using finite element analysis. A nearly incompressible, transversely isotropic (ITI) material model with three parameters (shear modulus, shear anisotropy, and tensile anisotropy) is used, which is appropriate for many fibrous, biological tissues. Both slow and fast shear waves travel concurrently through such a material with speeds that depend on the propagation direction relative to fiber orientation. A three-parameter estim

SUBMITTER: Tweten DJ 

PROVIDER: S-EPMC4663187 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature