Comparison of SWEI methods for measuring the frequency dependent phase velocity and attenuation in viscoelastic materials

Published

Conference Paper

© 2017 IEEE. This study compares three analysis methods to determine the frequency dependent phase velocity c(ω) and attenuation α(ω) from shear wave propagation in viscoelastic materials following acoustic radiation force impulse excitations. The analysis methods considered include shear wave spectroscopy, finite window 2D Fourier transform analysis, and analysis using group shear wave speeds (gSWS) calculated using fractional derivatives of the shear wave signals. For simulated shear wave data, results are compared to the true values of c(ω) and α(ω) calculated from the material parameters used in the simulations and show good agreement among the analysis methods, with somewhat lower agreement from the gSWS method in cases with low viscosity. Results from phantom measurements show good agreement among the three methods for measurements of c(ω). For α(ω), there is more scatter among repeated experimental measurements and less agreement among the analysis methods.

Full Text

Duke Authors

Cited Authors

  • Rouze, NC; Trutna, CA; Deng, Y; Palmeri, ML; Nightingale, KR

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.2017.8092915

Citation Source

  • Scopus