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.
Bibliographical noteFunding Information:
Manuscript received May 11, 2009; revised August 6, 2009. First published October 20, 2009; current version published February 17, 2010. This work was supported in part by the National Institutes of Health under Grant R21EB006070, Grant R01EB007920, and Grant R01HL080093, and in part by the National Science Foundation under Grant BES-0602957. Asterisk indicates corresponding author.
- Green's function
- MAT with magnetic induction (MAT-MI)
- Magnetoacoustic tomography (MAT)
- Time-domain reconstruction