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Estimation of model parameters characterizing dispersion in ARFI induced shear waves in in vivo human liver

Publication ,  Conference
Rouze, NC; Palmeri, ML; Nightingale, KR
Published in: IEEE International Ultrasonics Symposium, IUS
October 20, 2014

We consider the analysis of shear wave dispersion following ARFI excitation in a cohort of 135 Non-Alcoholic Fatty Liver Disease patients traditionally characterized as 'difficult-to-image.' Three analysis methods are considered: (1) measuring k(ω) by locating the maximum signal from the two-dimensional Fourier transform (2D-FT) of propagating shear wave data, (2) an extension of this method using model-based sums through 2D-FT data, and (3) shear wave spectroscopy. A linear dispersion model is used to characterize the frequency-dependent phase velocity. The analysis methods are evaluated in terms of robustness as determined by the rate of successful measurements in the patient data, and by the degrees of correlation and bias inherent with each method as determined by viscoelastic FEM validation studies. For these patient data and analysis procedures, although the 2D-FT methods are more robust than the shear wave spectroscopy method, they are also systematically biased. Even so, they can be used can be used to characterize the relative viscoelastic properties of liver.

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Published In

IEEE International Ultrasonics Symposium, IUS

DOI

EISSN

1948-5727

ISSN

1948-5719

ISBN

9781479970490

Publication Date

October 20, 2014

Start / End Page

983 / 986
 

Citation

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Rouze, N. C., Palmeri, M. L., & Nightingale, K. R. (2014). Estimation of model parameters characterizing dispersion in ARFI induced shear waves in in vivo human liver. In IEEE International Ultrasonics Symposium, IUS (pp. 983–986). https://doi.org/10.1109/ULTSYM.2014.0241
Rouze, N. C., M. L. Palmeri, and K. R. Nightingale. “Estimation of model parameters characterizing dispersion in ARFI induced shear waves in in vivo human liver.” In IEEE International Ultrasonics Symposium, IUS, 983–86, 2014. https://doi.org/10.1109/ULTSYM.2014.0241.
Rouze NC, Palmeri ML, Nightingale KR. Estimation of model parameters characterizing dispersion in ARFI induced shear waves in in vivo human liver. In: IEEE International Ultrasonics Symposium, IUS. 2014. p. 983–6.
Rouze, N. C., et al. “Estimation of model parameters characterizing dispersion in ARFI induced shear waves in in vivo human liver.” IEEE International Ultrasonics Symposium, IUS, 2014, pp. 983–86. Scopus, doi:10.1109/ULTSYM.2014.0241.
Rouze NC, Palmeri ML, Nightingale KR. Estimation of model parameters characterizing dispersion in ARFI induced shear waves in in vivo human liver. IEEE International Ultrasonics Symposium, IUS. 2014. p. 983–986.

Published In

IEEE International Ultrasonics Symposium, IUS

DOI

EISSN

1948-5727

ISSN

1948-5719

ISBN

9781479970490

Publication Date

October 20, 2014

Start / End Page

983 / 986