Nonlinear Least-Squares Estimation of Shear Wave Speeds in Viscoelastic Media

Nicholas A. Bannon, Matthew W. Urban, Robert J. McGough

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Rapid simulations of three-dimensional (3D) shear wave propagation in viscoelastic media with a Kelvin-Voigt model are enabled by Green's functions accelerated with graphics processing unit (GPU) parallelization using high performance computing (HPC) resources. From \mathbf{3D} waveforms, shear wave speed estimates are obtained through cross-correlations, where previous efforts have demonstrated that errors in the estimated shear wave speed increase with rising viscosity. To reduce the error in the shear wave speed estimate, a nonlinear least-squares approach accounting for propagation, attenuation, and waveform spreading is proposed for viscoelastic materials. The nonlinear least-squares approach yields an estimate of shear elasticity and shear viscosity.

Original languageEnglish (US)
Title of host publicationIUS 2022 - IEEE International Ultrasonics Symposium
PublisherIEEE Computer Society
ISBN (Electronic)9781665466578
StatePublished - 2022
Event2022 IEEE International Ultrasonics Symposium, IUS 2022 - Venice, Italy
Duration: Oct 10 2022Oct 13 2022

Publication series

NameIEEE International Ultrasonics Symposium, IUS
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727


Conference2022 IEEE International Ultrasonics Symposium, IUS 2022


  • Nonlinear least-squares
  • shear elasticity
  • shear viscosity
  • viscoelasticity

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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