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Chin. Phys. B, 2018, Vol. 27(10): 104302    DOI: 10.1088/1674-1056/27/10/104302
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Simulation research on effect of magnetic nanoparticles on physical process of magneto-acoustic tomography with magnetic induction

Xiao-Heng Yan(闫孝姮)1,2, Ying Zhang(张莹)1,2, Guo-Qiang Liu(刘国强)2,3
1 Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao 125105, China;
2 Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
3 School of Electronic Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 101407, China
Abstract  

Magneto-acoustic tomography with magnetic induction (MAT-MI) is a multiphysics coupled imaging technique that is combined with electrical impedance tomography and ultrasound imaging. In order to study the influence of adding magnetic nanoparticles as a contrast agent for MAT-MI on its physical process, firstly, we analyze and compare the electromagnetic and acoustical properties of MAT-MI theoretically before and after adding magnetic nanoparticles, and then construct a two-dimensional (2D) planar model. Under the guidance of space-time separation theory, we determine the reasonable simulation conditions and solve the electromagnetic field and sound field physical processes in the two modes by using the finite element method. The magnetic flux density, sound pressure distribution, and related one-dimensional (1D), 2D, and three-dimensional(3D) images are obtained. Finally, we make a qualitative and quantitative analysis based on the theoretical and simulation results. The research results show that the peak time of the time item separated from the sound source has a corresponding relationship with the peak time of the sound pressure signal. At this moment, MAMPT-MI produces larger sound pressure signals, and the sound pressure distribution of the MAMPT-MI is more uniform, which facilitates the detection and completion of sound source reconstruction. The research results may lay the foundation for the MAT-MI of magnetically responsive nanoparticle in subsequent experiments and even clinical applications.

Keywords:  magneto-acoustic tomography with magnetic induction      magnetic nanoparticles      magnetic flux density      sound pressure  
Received:  06 June 2018      Revised:  13 August 2018      Accepted manuscript online: 
PACS:  43.35.Rw (Magnetoacoustic effect; oscillations and resonance)  
  02.60.Cb (Numerical simulation; solution of equations)  
  43.20.Bi (Mathematical theory of wave propagation)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant Nos. 51507171,and 61427806).

Corresponding Authors:  Guo-Qiang Liu     E-mail:  liuguoqiang@mail.iee.ac.cn

Cite this article: 

Xiao-Heng Yan(闫孝姮), Ying Zhang(张莹), Guo-Qiang Liu(刘国强) Simulation research on effect of magnetic nanoparticles on physical process of magneto-acoustic tomography with magnetic induction 2018 Chin. Phys. B 27 104302

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