title: A robust image reconstruction algorithm and its parallel implementation in electrical impedance tomography.
abstract: 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.
authors.affiliation: Dept. of Biomed. Eng., Kon Kuk Univ., Choongbuk.
authors.forename: E J
authors.initials: EJ
authors.lastname: Woo
authors.forename: P
authors.initials: P
authors.lastname: Hua
authors.forename: J G
authors.initials: JG
authors.lastname: Webster
authors.forename: W J
authors.initials: WJ
authors.lastname: Tompkins