Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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A STATIC IMAGE RECONSTRUCTION ALGORITHM IN ELECTRICAL IMPEDANCE TOMOGRAPHY

임피던스 단층촬영기의 정적 영상 복원 알고리즘

  • 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)
  • 우응제 (건국대학교 의과대학 의학공학과) ;
  • ;
  • Published : 1991.05.15
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Abstract

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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