Identification of current density distribution in electrically conducting subject with anisotropic conductivity distribution

Chan Pyo Hyun, Ohin Kwon, Keun Seo Jin, Je Woo Eung

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Current density imaging (CDI) is able to visualize a three-dimensional current density distribution J inside an electrically conducting subject caused by an externally applied current. CDI may use a magnetic resonance imaging (MRI) scanner to measure the induced magnetic flux density B and compute J via the Ampere law J = 1/μ0∇ × B. However, measuring all three components of B = (Bx, By, Bz) has a technical difficulty due to the requirement of orthogonal rotations of the subject inside the MRI scanner. In this work, we propose a new method of reconstructing a current density image using only Bz data so that we can avoid the subject rotation procedure. The method utilizes an auxiliary injection current to compensate the missing information of Bx and By. The major advantage of the method is its applicability to a subject with an anisotropic conductivity distribution. Numerical experiments show the feasibility of the new technique.

Original languageEnglish
Pages (from-to)3183-3196
Number of pages14
JournalPhysics in medicine and biology
Volume50
Issue number13
DOIs
Publication statusPublished - 2005 Jul 7

All Science Journal Classification (ASJC) codes

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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