참고문헌
- Electrical Impedance Tomography J.G.Webster(ed.)
- Mag. Resonance in Med. v.28 RF current density imaging in homogeneous media G.C.Scott;M.L.G.Joy;R.L.Armstrong;R.M.Henkelman
- 대한의용생체공학회 춘계학술대회 논문집 v.15 no.1 유한요소법에 의한 인체내 전계분포 해석용 소프트웨어개발 우응제
대한의용생체공학회:의공학회지 (Journal of Biomedical Engineering Research)
- 제15권4호
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- Pages.413-418
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- 1994
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- 1229-0807(pISSN)
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- 2288-9396(eISSN)
자기공명촬영상에서 구한 내부 전류밀도를 이용한 임피던스 단층촬영법
Impedance Tomography using Internal Current Density Distribution Measured by Nuclear Magnetic Resonance
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Lee, Su-Yeol
(Dept.of Biomedical Engineering, College of Medicine, Kon Kuk University)
;
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U, Eung-Je
(Dept.of Biomedical Engineering, College of Medicine, Kon-Kuk University)
;
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Mun, Chi-Ung
(NMR Lab., Asan Institute for Life Sciences)
- 발행 : 1994.12.01
초록
In electrical impedance tomography (EIT), we use boundary current and voltage measurements to provide the information about the cross-sectional distribution of electrical impedance or resistivity One of the major problems in EIT has been the inaccessibility of internal voltage or current data in finding the internal impedance values. We propose a new image reconstruction method using internal current density data measured by NMR. We obtained a two-dimensional current density distribution within a phantom by processing the real and imaginary MR images from a 4.7T NMR machine. We implemented a resistivity image reconstruction algorithm using the finite element method and sensitivity matrix. We presented computer simulation results of the image reconstruction algorithm and furture direction of the research.