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Characterization of Viscoelastic Materials Using Group Shear Wave Speeds.

Publication ,  Journal Article
Rouze, NC; Deng, Y; Trutna, CA; Palmeri, ML; Nightingale, KR
Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control
May 2018

Recent investigations of viscoelastic properties of materials have been performed by observing shear wave propagation following localized, impulsive excitations, and Fourier decomposing the shear wave signal to parameterize the frequency-dependent phase velocity using a material model. This paper describes a new method to characterize viscoelastic materials using group shear wave speeds , , and determined from the shear wave displacement, velocity, and acceleration signals, respectively. Materials are modeled using a two-parameter linear attenuation model with phase velocity and dispersion slope at a reference frequency of 200 Hz. Analytically calculated lookup tables are used to determine the two material parameters from pairs of measured group shear wave speeds. Green's function calculations are used to validate the analytic model. Results are reported for measurements in viscoelastic and approximately elastic phantoms and demonstrate good agreement with phase velocities measured using Fourier analysis of the measured shear wave signals. The calculated lookup tables are relatively insensitive to the excitation configuration. While many commercial shear wave elasticity imaging systems report group shear wave speeds as the measures of material stiffness, this paper demonstrates that differences , , and of group speeds are first-order measures of the viscous properties of materials.

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Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

DOI

EISSN

1525-8955

ISSN

0885-3010

Publication Date

May 2018

Volume

65

Issue

5

Start / End Page

780 / 794

Related Subject Headings

  • Viscosity
  • Phantoms, Imaging
  • Fourier Analysis
  • Elasticity Imaging Techniques
  • Elasticity
  • Algorithms
  • Acoustics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
 

Citation

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Rouze, N. C., Deng, Y., Trutna, C. A., Palmeri, M. L., & Nightingale, K. R. (2018). Characterization of Viscoelastic Materials Using Group Shear Wave Speeds. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 65(5), 780–794. https://doi.org/10.1109/tuffc.2018.2815505
Rouze, Ned C., Yufeng Deng, Courtney A. Trutna, Mark L. Palmeri, and Kathryn R. Nightingale. “Characterization of Viscoelastic Materials Using Group Shear Wave Speeds.IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 65, no. 5 (May 2018): 780–94. https://doi.org/10.1109/tuffc.2018.2815505.
Rouze NC, Deng Y, Trutna CA, Palmeri ML, Nightingale KR. Characterization of Viscoelastic Materials Using Group Shear Wave Speeds. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 2018 May;65(5):780–94.
Rouze, Ned C., et al. “Characterization of Viscoelastic Materials Using Group Shear Wave Speeds.IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 65, no. 5, May 2018, pp. 780–94. Epmc, doi:10.1109/tuffc.2018.2815505.
Rouze NC, Deng Y, Trutna CA, Palmeri ML, Nightingale KR. Characterization of Viscoelastic Materials Using Group Shear Wave Speeds. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 2018 May;65(5):780–794.

Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

DOI

EISSN

1525-8955

ISSN

0885-3010

Publication Date

May 2018

Volume

65

Issue

5

Start / End Page

780 / 794

Related Subject Headings

  • Viscosity
  • Phantoms, Imaging
  • Fourier Analysis
  • Elasticity Imaging Techniques
  • Elasticity
  • Algorithms
  • Acoustics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering