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A robust image reconstruction algorithm and its parallel implementation in electrical impedance tomography

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4 Author(s)
Woo, E.J. ; Dept. of Biomed. Eng., Kon Kuk Univ., Choongbuk, South Korea ; Hua, P. ; Webster, J.G. ; Tompkins, Willis J.

An efficient and robust image reconstruction algorithm for static impedance imaging using Hachtel's augmented matrix method was developed. This improved Newton-Raphson method produced more accurate images by reducing the undesirable effects of the ill-conditioned Hessian matrix. It is demonstrated that the 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, the improved Newton-Raphson algorithm was implemented on a parallel computer system. It is shown that the parallel computation could reduce the computation time from hours to minutes

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Medical Imaging, IEEE Transactions on  (Volume:12 ,  Issue: 2 )