Guoya Dong et al 2004 Physiol. Meas. 25 209 doi:10.1088/0967-3334/25/1/027
Guoya Dong1,2, Hesheng Liu2, Richard H Bayford3,4, Rebecca Yerworth3,4, Shangkai Gao2, David Holder4 and Weili Yan1
Show affiliationsThe focal underdetermined system solver (FOCUSS) algorithm is a recursive algorithm to find the localized energy solution. It is an initialization-dependent algorithm. The generalized vector sample pattern matching (GVSPM) method has been applied to solve the inverse problem of electrical impedance tomography (EIT) and obtain smooth reconstructed images. By combining the GVSPM solution as the initial estimation of the FOCUSS algorithm, an idea termed the GVSPM-FOCUSS method is presented in this paper to improve the spatial resolution and precision of localization for EIT images. The comparisons are carried out between the EIT images reconstructed with the GVSPM-FOCUSS method and the GVSPM method alone. The effectiveness is verified by simulated and tank data for a model of a two-dimensional homogeneous circular disk.
87.63.Pn Electrical impedance tomography (EIT)
Issue 1 (February 2004)
Received 10 September 2003, accepted for publication 28 November 2003
Published 3 February 2004
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