Group-shearwave based viscoelastic parameter estimation: Analysis of sources of bias

Conference Paper

Shear Wave Elasticity Imaging is used to assess liver fibrosis, as shear wave speed (SWS) correlates with fibrosis stage. We have previously proposed a group SWS-based method to derive the tissue's stiffness (μ) and viscosity (η) using an analytic solution for the shear wave propagation in a Voigt material which accounts for the source excitation geometry [Rouze et al., IEEE IUS 2016]. However, in vivo factors such as phase aberration and nonlinear propagation cause the excitation beam pattern to differ from the modeled geometry. This work assesses the error introduced in material parameter determination by a range of perturbations in source geometry.

Full Text

Duke Authors

Cited Authors

  • Morris, DC; Rouze, N; Palmeri, M; Nightingale, K

Published Date

  • October 31, 2017

Published In

Electronic International Standard Serial Number (EISSN)

  • 1948-5727

International Standard Serial Number (ISSN)

  • 1948-5719

International Standard Book Number 13 (ISBN-13)

  • 9781538633830

Digital Object Identifier (DOI)

  • 10.1109/ULTSYM.2017.8092059

Citation Source

  • Scopus