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Proceedings Paper

Plane wave facing technique for ultrasonic elastography
Author(s): Mingu Lee; Hwan Shim; Byeong Geun Cheon; Yunsub Jung
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Paper Abstract

A shear wave generation technique which exploits multiple plane waves facing with each other toward their center line is introduced. On this line, ultrasonic waves interfere constructively resulting two planar shear waves that propagate to the opposite directions parallel to the transducer instead of oblique wave from multiple point focused pushes due to the temporal inconsistency of the pushes. One advantage of the plane wave facing technique over an unfocused push beam is that it generates much larger shear waves because it actively takes advantage of constructive interference between waves and, moreover, a larger number of elements can be used without diffusing the beam pattern. Field II simulated intensity maps of the push beams using the proposed method are presented with those of multiple point focusing and unfocusing techniques for comparison. In the simulation, two plane waves are considered for the simplicity, and the number of elements, apodization, and steering angles for facing are varied as parameters. Also, elasticity images of CIRS 049A phantom are presented using the proposed technique with comb-shaped push beams, i.e. multiple push beams are used simultaneously at different locations. L7-4 transducer is used for the simulation and elasticity imaging.

Paper Details

Date Published: 20 March 2014
PDF: 6 pages
Proc. SPIE 9040, Medical Imaging 2014: Ultrasonic Imaging and Tomography, 904017 (20 March 2014); doi: 10.1117/12.2043898
Show Author Affiliations
Mingu Lee, Samsung Electronics Co., Ltd. (Korea, Republic of)
Hwan Shim, Samsung Electronics Co., Ltd. (Korea, Republic of)
Byeong Geun Cheon, Samsung Electronics Co., Ltd. (Korea, Republic of)
Yunsub Jung, Samsung Electronics Co., Ltd. (Korea, Republic of)

Published in SPIE Proceedings Vol. 9040:
Medical Imaging 2014: Ultrasonic Imaging and Tomography
Johan G. Bosch; Marvin M. Doyley, Editor(s)

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