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Acoustic dipole radiation model for magnetoacoustic tomography with magnetic induction
作者姓名:李宜令  马青玉  章东  夏荣民
作者单位:Department of Educational Technology,Nanjing Normal University Key Laboratory of Optoelectronics of Jiangsu Province,School of Physics and Technology,Nanjing Normal University Institute of Acoustics,Nanjing University University of Arkansas for Medical Science,Little Rock
基金项目:Project supported by the National Basic Research Program of China (Grant No. 2011CB707900), the National Natural Science Foundation of China (Grant No. 10974098), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2009407), and the Specialized Research Fund for Doctoral Program of High Education of China (Grant No. 20093207120003).
摘    要:An acoustic dipole radiation model for magnetoacoustic tomography with magnetic induction (MAT-MI) is pro-posed,based on the analyses of one-dimensional tissue vibration,three-dimensional acoustic dipole radiation and acoustic waveform detection with a planar piston transducer.The collected waveforms provide information about the conductiv-ity boundaries in various vibration intensities and phases due to the acoustic dipole radiation pattern.Combined with the simplified back projection algorithm,the conductivity configuration of the measured layer in terms of shape and size can be reconstructed with obvious border stripes.The numerical simulation is performed for a two-layer cylindrical phantom model and it is also verified by the experimental results of MAT-MI for a tissue-like sample phantom.The proposed model suggests a potential application of conductivity differentiation and provides a universal basis for the further study of conductivity reconstruction for MAT-MI.

关 键 词:magnetoacoustic  tomography  with  magnetic  induction  acoustic  dipole  radiation  beam  pattern  biological  tissues
收稿时间:2011-01-22

Acoustic dipole radiation model for magnetoacoustic tomography with magnetic induction
Li Yi-Ling,Ma Qing-Yu,Zhang Dong and Xia Rong-Min.Acoustic dipole radiation model for magnetoacoustic tomography with magnetic induction[J].Chinese Physics B,2011,20(8):84302-084302.
Authors:Li Yi-Ling  Ma Qing-Yu  Zhang Dong and Xia Rong-Min
Institution:Department of Educational Technology, Nanjing Normal University, Nanjing 210097, China;Key Laboratory of Optoelectronics of Jiangsu Province, School of Physics and Technology, Nanjing Normal University, Nanjing 210046, China;Institute of Acoustics, Nanjing University, Nanjing 210093, China;University of Arkansas for Medical Science, Little Rock, AR 72205, USA
Abstract:An acoustic dipole radiation model for magnetoacoustic tomography with magnetic induction (MAT-MI) is proposed, based on the analyses of one-dimensional tissue vibration, three-dimensional acoustic dipole radiation and acoustic waveform detection with a planar piston transducer. The collected waveforms provide information about the conductivity boundaries in various vibration intensities and phases due to the acoustic dipole radiation pattern. Combined with the simplified back projection algorithm, the conductivity configuration of the measured layer in terms of shape and size can be reconstructed with obvious border stripes. The numerical simulation is performed for a two-layer cylindrical phantom model and it is also verified by the experimental results of MAT-MI for a tissue-like sample phantom. The proposed model suggests a potential application of conductivity differentiation and provides a universal basis for the further study of conductivity reconstruction for MAT-MI.
Keywords:magnetoacoustic tomography with magnetic induction  acoustic dipole radiation  beam pattern  biological tissues
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