Application of time reversal mirror technique in microwave-induced thermo-acoustic tomography system  

作　　者：CHEN GuoPing ZHAO ZhiQin ZHENG WenJun NIE ZaiPing LIU QingHuo 

机构地区：[1]School of Electronic Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China [2]Department of Electrical and Computer Engineering,Duke University,Durham,NC 277080,USA

出　　处：《Science China(Technological Sciences)》2009年第7期2087-2095,共9页中国科学（技术科学英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant No.60771042);the National Hi-Tech Research and Development Program("863"Project)(Grant No.2007AA12Z159);111Project(Grant No.B07046);SiChuan Excellent Youth Foun-dation(Grant No.08ZQ026-039);Program for New Century Excellent Talents in University of China and Program for Changjiang Scholars

摘　　要：Microwave-induced thermo-acoustic tomography (MITAT) is a promising technique with great potential in biomedical imaging. It has both the high contrast of the microwave imaging and the high resolution of the ultrasound imaging. In this paper, the proportional relationship between the absorbed microwave energy distribution and the induced ultrasound source distribution is derived. Further, the time reversal mirror (TRM) technique based on the pseudo-spectral time domain (PSTD) method is applied to MITAT system. The simulation results show that high contrast and resolution can be achieved by the TRM technique based on PSTD method even for the received signals with very low signal-to-noise ratio (SNR) and the model parameter with random fluctuation.Microwave-induced thermo-acoustic tomography (MITAT) is a promising technique with great potential in biomedical imaging. It has both the high contrast of the microwave imaging and the high resolution of the ultrasound imaging. In this paper, the proportional relationship between the absorbed microwave energy distribution and the induced ultrasound source distribution is derived. Further, the time reversal mirror (TRM) technique based on the pseudo-spectral time domain (PSTD) method is applied to MITAT system. The simulation results show that high contrast and resolution can be achieved by the TRM technique based on PSTD method even for the received signals with very low signal-to-noise ratio (SNR) and the model parameter with random fluctuation.

关 键 词：microwave-induced thermo-acoustic tomography (MITAT) TIME REVERSAL MIRROR (TRM) pseudo–spectrum TIME domain (PSTD) 

分 类 号：TH74[机械工程—光学工程]