대한의용생체공학회:학술대회논문집 (Proceedings of the KOSOMBE Conference)
- 대한의용생체공학회 1991년도 춘계학술대회
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- Pages.5-7
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- 1991
임피던스 단층촬영기의 정적 영상 복원 알고리즘
A STATIC IMAGE RECONSTRUCTION ALGORITHM IN ELECTRICAL IMPEDANCE TOMOGRAPHY
- 우응제 (건국대학교 의과대학 의학공학과) ;
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- Woo, Eung-Je (Dept. of Biomed. Eng., Kon Kuk University) ;
- Webster, John G. (Dept. of Elec. and Comp. Eng., University of Wisconsin-Madison) ;
- Tompkins, Willis J. (Dept. of Elec. and Comp. Eng., University of Wisconsin-Madison)
- 발행 : 1991.05.15
초록
We have developed an efficient and robust image reconstruction algorithm for static impedance imaging. This improved Newton-Raphson method produced more accurate images by reducing the undesirable effects of the ill-conditioned Hessian matrix. We found that our electrical impedance tomography (EIT) system could produce two-dimensional static images from a physical phantom with 7% spatial resolution at the center and 5% at the periphery. Static EIT image reconstruction requires a large amount of computation. In order to overcome the limitations on reducing the computation time by algorithmic approaches, we implemented the improved Newton-Raphson algorithm on a parallel computer system and showed that the parallel computation could reduce the computation time from hours to minutes.
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