Measure elasticity and viscosity using the out-of-plane shear wave

Heng Zhao, Bo Qiang, Carolina Amador, Pengfei Song, Matthew W. Urban, Randall R. Kinnick, James F. Greenleaf, Shigao Chen

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

Abstract

Tissue elasticity μ1 and viscosity μ2 can be estimated by evaluating dispersion of shear wave propagation velocity over a range of frequencies. Alternatively, μ1 and μ2 can be calculated from shear wave attenuation αs and velocity cs at a single frequency. For shear waves generated by a focused ultrasound beam, attenuation due to geometric spreading makes it difficult to estimate αs correctly. In this study, we use a wide unfocused beam to generate quasi-planar radiation force (minimal diffraction) and monitor the out-of-plane (elevation direction) shear wave propagation using another transducer. Frequency dependent cs and αs values are calculated from the 2D Fourier transform (k-space) of the spatiotemporal shear wave data, using peak extraction and a full-width-of-half-maximum (FWHM) method. Simulation and experiment studies show good agreement between the results using the proposed method and the theoretical or independent measurement results. With the two probes placed on one side of the target or integrated into a 2D array probe, the proposed method could be applied to study in vivo tissue viscoelastic properties.

Original languageEnglish (US)
Title of host publication2012 IEEE International Ultrasonics Symposium, IUS 2012
Pages212-215
Number of pages4
DOIs
StatePublished - Dec 1 2012
Externally publishedYes
Event2012 IEEE International Ultrasonics Symposium, IUS 2012 - Dresden, Germany
Duration: Oct 7 2012Oct 10 2012

Publication series

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

Other

Other2012 IEEE International Ultrasonics Symposium, IUS 2012
CountryGermany
CityDresden
Period10/7/1210/10/12

Keywords

  • Attenuation
  • Elasticity and viscosity
  • FWHM
  • Out-of-plane shear wave

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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  • Cite this

    Zhao, H., Qiang, B., Amador, C., Song, P., Urban, M. W., Kinnick, R. R., Greenleaf, J. F., & Chen, S. (2012). Measure elasticity and viscosity using the out-of-plane shear wave. In 2012 IEEE International Ultrasonics Symposium, IUS 2012 (pp. 212-215). [6562185] (IEEE International Ultrasonics Symposium, IUS). https://doi.org/10.1109/ULTSYM.2012.0053