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DOI: 10.14569/IJACSA.2016.070255
PDF

On Shear Wave Speed Estimation for Agar-Gelatine Phantom

Author 1: Hassan M. Ahmed
Author 2: Nancy M. Salem
Author 3: Ahmed F. Seddik
Author 4: Mohamed I. El Adawy

International Journal of Advanced Computer Science and Applications(IJACSA), Volume 7 Issue 2, 2016.

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Abstract: Conventional imaging of diagnostic ultrasound is widely used. Although it makes the differences in the soft tissues echogenicities’ apparent and clear, it fails in describing and estimating the soft tissue mechanical properties. It cannot portray their mechanical properties, such as the elasticity and stiffness. Estimating the mechanical properties increases chances of the identification of lesions or any pathological changes. Physicians are now characterizing the tissue’s mechanical properties as diagnostic metrics. Estimating the tissue’s mechanical properties is achieved by applying a force on the tissue and calculating the resulted shear wave speed. Due to the difficulty of calculating the shear wave speed precisely inside the tissue, it is estimated by analyzing ultrasound images of the tissue at a very high frame rate. In this paper, the shear wave speed is estimated using finite element analysis. A model is constructed to simulate the tissue’s mechanical properties. For a generalized soft tissue model, Agar-gelatine model is used because it has properties similar to that of the soft tissue. A point force is applied at the center of the proposed model. As a result of this force, a deformation is caused. Peak displacements are tracked along the lateral dimension of the model for estimating the shear wave speed of the propagating wave using the Time-To-Peak displacement (TTP) method. Experimental results have shown that the estimated speed of the shear wave is 5.2 m/sec. The speed value is calculated according to shear wave speed equation equals about 5.7 m/sec; this means that our speed estimation system’s accuracy is about 91 %, which is reasonable shear wave speed estimation accuracy with a less computational power compared to other tracking methods.

Keywords: Elasticity Imaging; Acoustic radiation force impulse (ARFI); Shear wave elasticity imaging; Soft tissue stiffness imaging

Hassan M. Ahmed, Nancy M. Salem, Ahmed F. Seddik and Mohamed I. El Adawy, “On Shear Wave Speed Estimation for Agar-Gelatine Phantom” International Journal of Advanced Computer Science and Applications(IJACSA), 7(2), 2016. http://dx.doi.org/10.14569/IJACSA.2016.070255

@article{Ahmed2016,
title = {On Shear Wave Speed Estimation for Agar-Gelatine Phantom},
journal = {International Journal of Advanced Computer Science and Applications},
doi = {10.14569/IJACSA.2016.070255},
url = {http://dx.doi.org/10.14569/IJACSA.2016.070255},
year = {2016},
publisher = {The Science and Information Organization},
volume = {7},
number = {2},
author = {Hassan M. Ahmed and Nancy M. Salem and Ahmed F. Seddik and Mohamed I. El Adawy}
}



Copyright Statement: This is an open access article licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, even commercially as long as the original work is properly cited.

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