title: Reconstruction of current density distributions in axially symmetric cylindrical sections using one component of magnetic flux density: computer simulation study.
abstract: In magnetic resonance current density imaging (MRCDI), we inject current into a subject through surface electrodes and measure the induced magnetic flux density B inside the subject using an MRI scanner. Once we have obtained all three components of B, we can reconstruct the internal current density distribution J = inverted triangle x B/mu0). This technique, however, requires subject rotation since the MRI scanner can measure only one component of B that is parallel to the direction of its main magnetic field. In this paper, under the assumption that the out-of-plane current density Jz is negligible in an imaging slice belonging to the xy-plane, we developed an imaging technique of current density distributions using only Bz, the z-component of B. The technique described in this paper does not require a subject rotation but the quality of reconstructed images depends on the amount of out-of-plane current density Jz. From numerical simulations, we found that the new algorithm could be applied to subjects such as human limbs using longitudinal electrodes.
authors.affiliation: Department of Mathematics, Yonsei University, Korea.
authors.forename: Jin Keun
authors.initials: JK
authors.lastname: Seo
authors.forename: Ohin
authors.initials: O
authors.lastname: Kwon
authors.forename: Byung Il
authors.initials: BI
authors.lastname: Lee
authors.forename: Eung Je
authors.initials: EJ
authors.lastname: Woo
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D004566:Electrodes; D005121:Extremities; D006801:Humans; D008280:Magnetics; D008954:Models, Biological