Study of Pulsed Magnetic Field Used in Magnetioacoustic Tomography with Magnetic Induction
Huang Xin1, 2, Liu Guoqiang1, Xia Hui1, Lu Liang3, Deng Qiwen4
1. Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China; 2. Graduate University of Chinese Academy of Sciences Beijing 100190 China; 3. Wind Power Technology Center of Gansu Electronic Power Company Lanzhou 730050 China; 4. Wuhan University Wuhan 430072 China
Abstract：Excitation coil is the important component of magnetioacoustic tomography with magnetic induction(MAT-MI) device. In experiments, pulsed or alternating current are added to double coils, and double coils provide pulsed magnetic simulation to the sample, pulsed eddy current is then induced. At present, researches about magnetic flux density of double coils only present the value of magnetic flux density in special positions, what’s more, the excitation current added to the coils is limited to be constant current. This paper deduces the distribution of magnetic flux density and the change law of the double coils with time-varying current. With the help of Comsol Multiphysics, the paper makes a further discussion of both magnetic flux density and its change law with time. At last, verification was made in MAT-MI experiment.
黄欣, 刘国强, 夏慧, 路亮, 邓棋文. 感应式磁声成像的脉冲磁场研究[J]. 电工技术学报, 2013, 28(2): 67-72.
Huang Xin, Liu Guoqiang, Xia Hui, Lu Liang, Deng Qiwen. Study of Pulsed Magnetic Field Used in Magnetioacoustic Tomography with Magnetic Induction. Transactions of China Electrotechnical Society, 2013, 28(2): 67-72.
[1] Xu Y, He B. Magnetoacoustic tomography with magnetic induction(MAT-MI)[J]. Physics in Medicine and Biology, 2005, 50: 5175-5187. [2] Li X, Xu Y, He B. Magnetoacoustic tomography with magnetic induction for imaging electrical impedance of biological tissue[J]. Applied Physics, 2006, 99: 066112-066112-3. [3] He B. High-resolution Functional Source and Impedance Imaging[C]. Proceedings of the 27th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Shanghai, China, 2005: 4178-4182. [4] Xia R, Li X, He B. Magnetoacoustic tomographic imaging of electrical impedance with magnetic induction[J]. Applied Physics Letters, 2007, 91: 083903-083903-3. [5] 曹昌琪. 电动力学[M]. 北京: 人民教育出版社, 1961. [6] 毕德显. 电磁场理论[M]. 北京: 电子工业出版社, 1985. [7] Grandori F Ravazzani P. Magnetic stimulation of the motor cortex: theoretical considerations[J]. IEEE Transactions on Biomedical Engineering, 1991, 38(2): 180-191. [8] 冯慈璋. 电磁场[M]. 北京: 高等教育出版社, 1983. [9] 刘国强. 医学电磁成像[M]. 北京: 科学出版社, 2006. [10] COMSOL Multiphysics Help. AC/DC Module User’s Guide, 2006.
2013, Vol. 28 
