Magnetoacoustic tomography with current injection  

作　　者：LIU GuoQiang HUANG Xin XIA Hui WU ShiZeng 

机构地区：[1]Institute of Electrical Engineering,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Chinese Science Bulletin》2013年第30期3600-3606,共7页

基　　金：supported by the National Natural Science Foundation of China(50977084,2009B48,61002036,61271424 and 51137004)

摘　　要：Magnetoacoustic tomography combines the advantages of electrical impedance tomography with sonography.It can reconstruct conductivity images of biological tissue with high spatial resolution and high contrast.In addition,magnetoacoustic tomography is a new nondestructive functional imaging technology,with which we can realize the early diagnosis of human diseases.In this paper,through theory analysis we deduced the analytical formula of acoustic pressure.Computer simulation and experimental studies on magnetoacoustic tomography with current injection(MAT-CI)were made,and a copper ring was used as the model for the simulation and experiment.Experimental setup and methods are introduced,and the acoustic signals and the image of a metal object by means of MAT-CI are presented.Results of the simulation and experiment were in a good agreement.The reconstructed image of an acoustic source can reflect the conductivity information of a sample.The conductivity distribution of a sample can be obtained by means of MAT-CI.The results provide foundations of study on a model with complex conductivity distribution and tissues for MAT-CI.Magnetoacoustic tomography combines the advantages of electrical impedance tomography with sonography. It can reconstruct conductivity images of biological tissue with high spatial resolution and high contrast. In addition, magnetoacoustic tomography is a new nondestructive functional imaging technology, with which we can realize the early diagnosis of human diseases. In this paper, through theory analysis we deduced the analytical formula of acoustic pressure. Computer simulation and experimental studies on magnetoacoustic tomography with current injection （MAT-CI） were made, and a copper ring was used as the model for the simulation and experiment. Experimental setup and methods are introduced, and the acoustic signals and the image of a metal object by means of MAT-CI are presented, Results of the simulation and experiment were in a good agreement. The reconstructed image of an acoustic source can reflect the conductivity information of a sample. The conductivity distribution of a sample can be obtained by means of MAT-CI. The results provide foundations of study on a model with complex conductivity distribution and tissues for MAT-CI.

关 键 词：断层扫描 注入电流 实验模型 高空间分辨率 图像重建 生物组织 电阻抗成像 计算机模拟 

分 类 号：O441[理学—电磁学]