Abstract

Magneto-acoustic tomography with magnetic induction (MAT-MI) is a new imaging technology, which making use of the coupling effect of the sound field, electric field and magnetic field to obtain an accurate conductivity distribution of the measured organization to achieve non-destructive detection. MAT-MI can display the change of human organs during physical activities, and discovery the pathologic reaction of the measured organization in time, so it can supply prospective information for people. This method has application prospect in many respects, such as non-invasive detection, early diagnosis, continuous monitoring and so on. In this paper, copper sheet is selected as experimental sample. Firstly, propose the multi-physics fields coupling calculation method based on two-dimensional axisymmetric transient model, includes electromagnetic field, displacement field and sound field, and calculate out the simulation result of sound field. Then according to the simulation result, build acoustic wave detection circuit, and design detection experiment. The coherence of experimental results and simulation results not only verify the correctness of theoretical analysis, but also illuminate the feasibility of the method, and establish the foundation for clinical medical study. Verf.-Referat