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http://dx.doi.org/10.7776/ASK.2012.31.6.399

Measurement of the Shear Modulus of an Ultrasound Tissue Phantom  

Park, Jeong-Man (대진대학교 물리학과)
Choi, Seung-Min (대진대학교 전자공학과)
Kwon, Sung-Jae (대진대학교 통신공학과)
Jeong, Mok-Kun (대진대학교 전자공학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.31, no.6, 2012 , pp. 399-409 More about this Journal
Abstract
In this paper we propose a method for measuring the shear modulus of an ultrasound soft tissue phantom using an acoustic radiation force. The proposed method quantitatively determines the shear modulus based on the rise time of a displacement induced by an acoustic radiation force at the focal point of a focused ultrasound beam. The shear wave speed and shear modulus obtained from the proposed method and a shear wave propagation method were compared to verify the validity of the proposed method. In the shear wave propagation method, the shear modulus is first computed by measuring the propagating speed of a shear wave induced in a phantom by a limited-diffraction transmit field, and then was compared to that obtained with the proposed method in an ultrasound data acquisition system calibrated based on the first computed shear modulus. The relative errors between the two methods were found to be 4% for shear wave speed and less than 9% for shear modulus, confirming the usefulness of the proposed method.
Keywords
Shear wave propagation speed; Shear modulus; limited diffraction; Rise time;
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