MAGNETIC RESONANCE ELECTRICAL IMPEDANCE TOMOGRAPHY

  • Kwon, Oh-In ;
  • Seo, Jin-Keun ;
  • Woo, Eung-Je ;
  • Yoon, Jeong-Rock
  • Published : 2001.07.01

Abstract

Magnetic Resonance Electrical Impedance Tomography(MREIT) is a new medical imaging technique for the cross-sectional conductivity distribution of a human body using both EIT(Electrical Impedance Tomography) and MRI(Magnetic Resonance Imaging) system. MREIT system was designed to enhance EIT imaging system which has inherent low sensitivity of boundary measurements to any changes of internal tissue conductivity values. MREIT utilizes a recent CDI (Current Density Imaging) technique of measuring the internal current density by means of MRI technique. In this paper, a mathematical modeling for MREIT and image reconstruction method called the alternating J-substitution algorithm are presented. Computer simulations show that the alternating J-substitution algorithm provides accurate high-resolution conductivity images.

Keywords

magnetic resonance electrical impedance tomography;current density imaging;J-substitution algorithm

References

  1. IEEE Trans. Med. Imag. v.10 Measurement of nonuniform current density by magnetic resonance G. C. Scott;M. L. G. Joy;R. L. Amstrong;R. M. Henkelman
  2. Impedance tomography using internal current density distribution measured by nuclear magnetic resonance E. J. Woo;S. Y. Lee;C. W. Mun
  3. Magnetic Resonance Electrical Impedance Tomograsphy(MERIT);Simulation study of J-Substitution Algorithm O. Kwon;E. J. Woo;J. R. Yoon;J.K. Seo
  4. J. Mag. Res. v.97 Sensitivity of magnetic-resonance current density imaging G. C. Scott;M. L. G. Joy;R. L. Amstrong;R. M. Henkelman
  5. Med. Biol. Eng. Comp. v.36 Measurement of electrical current density distribution within the tissues of the head by magnetic resonance imaging H. R. Gamba;D. T. Delpy
  6. On a nonlinear partial differential equatation arising in MREIT S. W. Kim;O. Kwon;J. K. Seo;J. R. Yoon
  7. Alternating J-substitution algorithm and its convegergence analysis for MERIT O. Kwon;J. K. Seo;J. R. Yoon
  8. IEEE Trans. Med. Imag. v.14 Electrmagnetic consideration for RF current density imaging G. C. Scott;M. L. G. Joy;R. L. Amstrong;R. M. Henkelman