In this paper, we report a theoretical study on magnetoacoustic tomography with magnetic induction (MAT-MI). According to the description of signal generation mechanism using Greens function, the acoustic dipole model was proposed to describe acoustic source excited by the Lorentz force. Using Greens function, three kinds of reconstruction algorithms based on different models of acoustic source (potential energy, vectored acoustic pressure, and divergence of Lorenz force) are deduced and compared, and corresponding numerical simulations were conducted to compare these three kinds of reconstruction algorithms. The computer simulation results indicate that the potential energy method and vectored pressure method can directly reconstruct the Lorentz force distribution and give a more accurate reconstruction of electrical conductivity.
- Green's function
- MAT with magnetic induction (MAT-MI)
- Magnetoacoustic tomography (MAT)
- Time-domain reconstruction