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http://dx.doi.org/10.7776/ASK.2012.31.3.151

Fast Acoustic Radiation Force Impulse Imaging Using Non-focused Transmission in Medical Ultrasound Imaging  

Choi, Seung-Min (대진대학교 전자공학과)
Park, Jeong-Man (대진대학교 물리학과)
Kwon, Sung-Jae (대진대학교 통신공학과)
Jeong, Mok-Kun (대진대학교 전자공학과)
Abstract
In medical ultrasound imaging, elasticity imaging helps to diagnose tumors such as cancer. This paper is concerned with the application of acoustic radiation force to soft tissue of interest to implement elasticity imaging. In order to reduce the data acquisition time, instead of relying on transmit focusing, a plane wave of burst type is transmitted to apply the acoustic radiation force simultaneously to an entire imaging region to be observed. A homogeneous phantom experiment confirms that increasing the transmit excitation duration instead of employing transmit focusing generates a high enough acoustic radiation force to obtain elasticity images. It is found, however, that a different displacement versus time characteristic is observed unlike the case of using a conventional focused acoustic radiation force. Experimental results obtained through the use of an ultrasound phantom and a bovine liver show that lesions can be correctly differentiated.
Keywords
Acoustic Radiation Force; ARFI imaging; Elasticity image; Plane wave transmission;
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