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Design and Performance Analysis of Current Source for 3.0T MREIT System  

김규식 (경희대학교 전자정보대학 동서의료공학과)
오동인 (경희대학교 전자정보대학 동서의료공학)
백상민 (경희대학교 전자정보대학 동서의료공학)
오석훈 (경희대학교 동서의학대학)
우응제 (경희대학교 전자정보대학 동서의료공학)
이수열 (경희대학교 동서의학대학)
이정한 (건국대학교 의과대학 의학공학부)
Publication Information
Journal of Biomedical Engineering Research / v.25, no.3, 2004 , pp. 165-169 More about this Journal
Abstract
In Magnetic Resonance Electrical Impedance Tomography (MREIT), we inject current through electrodes placed on the surface of a subject and measure the induced magnetic flux density distribution using an MRI scanner. This requires a constant current source whose output pulses are synchronized with MR pulse sequences. In this paper, we present a design and performance analysis of a current source used in a 3.0T MREIT system. The developed current source was tested using a saline phantom. We found that its performance is satisfactory for the current MREIT system. We suggest future improvements for better SNR(signal-to-noise ratio).
Keywords
MREIT; Current source; Magnetic flux density;
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  • Reference
1 Reconstruction of conductivity and current density images using only one component of magnetic field measurements /
[ J. K. Seo;J. R. Yoon;E. J. Woo;O. Kwon ] / IEEE Trans. Biomed. Eng.   DOI   ScienceOn
2 Reconstruction of current density distributions in axially symmetric cylindrical sections using one component of magnetic flux density: computer simulation study /
[ J. K. Seo;O. Kwon;B. I. Lee;E. J. Woo ] / Physiol. Meas.   DOI   ScienceOn
3 J-substitution algorithm in magnetic resonance electrical impedance tomography (MREIT): phantom experiments for static resistivity images /
[ H. S. Khang;B. I. Lee;S. H. Oh;E. J. Woo;S. Y. Lee;M .H. Cho;I. Kwon;J. R. Yoon;J. K. Seo ] / IEEE Trans. Med. Imaging   DOI   ScienceOn
4 Conductivity and current density image reconstruction using harmonic Bz algorithm in magnetic resonance electrical impedance tomography /
[ S. H. Oh;B. I. Lee;E. J. Woo;S. Y. Lee;M. H. Cho;O. Kwon;J. K. Seo ] / Phys. Med. Biol.   DOI   ScienceOn
5 Magnetic resonance electrical impedance tomography: phantom experiments using a 3.0 Tesla MRI system /
[ S. H. Oh;B. I. Lee;S. Y. Lee;E. J. Woo;M. H. Cho;O. Kwon;J. K. Seo ] / Magn. Reson. Med.
6 /
[ J. G. Webster(ed.) ] / Electrical Impednace Tomography
7 Impedance tomography using internal current density distribution measured by nuclear magnetic resonance /
[ E. J. Woo;S. Y. Lee;C. W. Mun ] / SPIE   DOI
8 Magnetic resonance electrical impedance tomography (MREIT): simulation study of J-substitution algorithm /
[ Kwon, E. Woo;J. R. Yoon;J. K. Seo ] / IEEE Trans. Biomed. Eng.   DOI   ScienceOn
9 Static resistivity image of a cubic saline phantom in magnetic resonance electrical impedance tomography (MREIT) /
[ B. I. Lee;S. H. Oh;E. J. Woo;S. Y. Lee;M. H. Cho;O. Kwon;J. K. Seo;W. S. Baek ] / Physiol. Meas.   DOI   ScienceOn
10 /
[ Texas Instruments ] / TMS320LF240x DSP Controllers Reference Guide
11 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
12 Sensitivity of magnetic-resonance current density imaging /
[ G. C. Scott;M. L. G. Joy;R. L. Armstrong;R. M. Henkelman ] / J. Mag. Res.
13 /
[ S. Franco ] / Design with Operational Amplifiers and Analog Integrated Circuits
14 Precision Constant Current Source for Electrical Impedance Tomography /
[ J. W. Lee;T. I. Oh;S. M. Paek;J. S. Lee;E. J. Woo ] / Proc. IEEE EMBS