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Proceedings Paper

Image reconstruction with acoustic radiation force induced shear waves
Author(s): Stephen A. McAleavey; Kathryn R. Nightingale; Deborah L. Stutz; Stephen J Hsu; Gregg E. Trahey
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Paper Abstract

Acoustic radiation force may be used to induce localized displacements within tissue. This phenomenon is used in Acoustic Radiation Force Impulse Imaging (ARFI), where short bursts of ultrasound deliver an impulsive force to a small region. The application of this transient force launches shear waves which propagate normally to the ultrasound beam axis. Measurements of the displacements induced by the propagating shear wave allow reconstruction of the local shear modulus, by wave tracking and inversion techniques. Here we present in vitro, ex vivo and in vivo measurements and images of shear modulus. Data were obtained with a single transducer, a conventional ultrasound scanner and specialized pulse sequences. Young's modulus values of 4 kPa, 13 kPa and 14 kPa were observed for fat, breast fibroadenoma, and skin. Shear modulus anisotropy in beef muscle was observed.

Paper Details

Date Published: 23 May 2003
PDF: 12 pages
Proc. SPIE 5035, Medical Imaging 2003: Ultrasonic Imaging and Signal Processing, (23 May 2003); doi: 10.1117/12.480275
Show Author Affiliations
Stephen A. McAleavey, Duke Univ. (United States)
Kathryn R. Nightingale, Duke Univ. (United States)
Deborah L. Stutz, Duke Univ. (United States)
Stephen J Hsu, Duke Univ. (United States)
Gregg E. Trahey, Duke Univ. (United States)

Published in SPIE Proceedings Vol. 5035:
Medical Imaging 2003: Ultrasonic Imaging and Signal Processing
William F. Walker; Michael F. Insana, Editor(s)

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