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Numerical Analysis of Three-Dimensional Magnetic Resonance Current Density Imaging (MRCDI)  

B.I. Lee (College of Electronics and Information, Kyung Hee University)
S.H. Oh (Graduate School of East-West Medical Sciences, Kyung Hee University)
E.J. Woo (College of Electronics and Information, Kyung Hee University)
G. Khang (College of Electronics and Information, Kyung Hee University)
S.Y. Lee (Graduate School of East-West Medical Sciences, Kyung Hee University)
M.H. Cho (Graduate School of East-West Medical Sciences, Kyung Hee University)
O. Kwon (Department of Mathematics, Konkuk University)
J.R. Yoon (School of Mathematics, Korea Institute for Advanced Study)
J.K. Seo (Department of Mathematics, Yonsei University)
Publication Information
Journal of Biomedical Engineering Research / v.23, no.4, 2002 , pp. 269-279 More about this Journal
Abstract
When we inject a current into an electrically conducting subject such as a human body, voltage and current density distributions are formed inside the subject. The current density within the subject and injection current in the lead wires generate a magnetic field. This magnetic flux density within the subject distorts phase of spin-echo magnetic resonance images. In Magnetic Resonance Current Density Imaging (MRCDI) technique, we obtain internal magnetic flux density images and produce current density images from $\bigtriangledown{\times}B/\mu_\theta$. This internal information is used in Magnetic Resonance Electrical Impedance Tomography (MREIT) where we try to reconstruct a cross-sectional resistivity image of a subject. This paper describes numerical techniques of computing voltage. current density, and magnetic flux density within a subject due to an injection current. We use the Finite Element Method (FEM) and Biot-Savart law to calculate these variables from three-dimensional models with different internal resistivity distributions. The numerical analysis techniques described in this paper are used in the design of MRCDI experiments and also image reconstruction a1gorithms for MREIT.
Keywords
MRCDI; MREIT; Injection current; Current density; Magnetic flux density; FEM; Biot-Savart law;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Measurement of electrical current density distribution within the tissues of the head by magnetic resonance imaging /
[ H.R. Gamba;D.T. Delpy ] / Med. Biol. Eng. Comp.   DOI   ScienceOn
2 /
[ D.S. Burnett ] / Finite Element Analysis
3 In vivo detection of applied electric currents by magnetic resonance imaging /
[ M.L.G. Joy;G.C. Scott;R.M. Henkelman ] / Mag. Reson. Imag.   DOI   ScienceOn
4 Measurement of nonuniform current density by magnetic resonance /
[ G.C. Scott;M.L.G. Joy;R.L. Armstrong;R.M. Henkelman ] / IEEE Trans. Med. Imag.   DOI   ScienceOn
5 Sensitivity of magnetic-resonance current density imaging /
[ G.C. Scott;M.L.G. Joy;R.L. Armstrong;R.M. Henkelman ] / J. Mag. Res.
6 /
[ J.R. Yoon ] / Calculation of B including lead-wire effects
7 Three-dimensional forward solver for magnetic resonance electrical impedance tomography(MREIT) /
[ B.I. Lee;S.H. Oh;E.J. Woo;S.Y. Lee;M.H. Cho;O. Kwon;J.R. Yoon;J.K. Seo ] / submitted to IEEE Trans. Biomed. Eng.
8 J-substitution algorith, in magnetic resonance electrical impedance tomography (MREIT): phantom experiments for static resisitivity images /
[ H.S. Khang;B.I. Lee;S.H. Oh;E.J. Woo;S.Y. Lee;M.H. Cho;O. Kwon;J.R. Yoon;J.K. Seo ] / IEEE Trans. Med. Imaging   DOI   ScienceOn
9 Impedance tomography using internal current density distribution measured by nuclear magnetic resonance /
[ E.J. Woo;S.Y. Lee;C.W. Mun ] / SPIE   DOI
10 Magnetic resonance electrical impedance tomography(MREIT): simulation study of J-substitution algorithm /
[ O. Kwon;E.J. Woo;J.R. Yoon;J.K. Seo ] / IEEE Trans. Biomed. Eng.
11 A dual modality system for high resolution-true conductivity imaging /
[ M. Eyuboglu;O. Birgul;Y.Z. Ider ] / Proc. ⅩⅠ Int. Conf. Elec. Bioimpedance(ICEBI)
12 Imaging of current density and current pathways in rabbit brain during transcranial electrostimulation /
[ M.L.G. Joy;V.P. Lebedev;J.S. Gati ] / IEEE Trans. Biomed. Eng.   DOI   ScienceOn
13 Electromagnetic considerations for RF current density imaging /
[ G.C. Scott;M.L.G. Joy;R.L. Armstrong;R.M. Henkelman ] / IEEE Trans. Med. Imaging.   DOI   ScienceOn
14 Magnetic resonance electrical impedance tomography /
[ O. Kwon;J.K. Seo;E.J. Woo;J.R. Yoon ] / Comm. Korean Math. Soc.   과학기술학회마을
15 Imaging electrical current density using nuclear mangetic resonance /
[ M. Eyuboglu;R. Reddy;J.S. Leigh ] / Elektrik
16 Magnetic resonance conductivity imaging using 0.15 Tesla MRI scanner /
[ Birgll;O. zbekl;B.M. Eybogulu;Y.Z. Ider ] / Proc. 23rd Ann. Int. Conf. IEEE Eng. Med. Viol. Soc.
17 /
[ J. Jin ] / The Finite Element Method in Electromagnetics
18 /
[ D.K. Cheng ] / Field and Wave Electromagnetic(2nd ed.)
19 Magnetic resonance current density imaging for MREIT /
[ S.H. Oh;B.I. Lee;E.J. Woo;S.Y. Lee;M.H. Cho;O. Kwon;J.R. Yoon;J.K. Seo ] / submitted to J. Biomed. Eng. Research