Reconstruction of current density distributions in axially symmetric cylindrical sections using one component of magnetic flux density: Computer simulation study

Jin Keun Seo, Ohin Kwon, Byung Il Lee, Eung Je Woo

Research output: Contribution to journalArticle

33 Citations (Scopus)

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 = ∇ × B/μ0. 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.

Original languageEnglish
Pages (from-to)565-577
Number of pages13
JournalPhysiological measurement
Volume24
Issue number2
DOIs
Publication statusPublished - 2003 May 1

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Physiology
  • Biomedical Engineering
  • Physiology (medical)

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