Tracking conductivity variations in the absence of accurate state evolution models in electrical impedance tomography
Hashemzadeh, Parham and Sahota, Vijay and Callaghan, Martina and El Dib, Hussein and Tizzard, Andrew and Svensson, L. and Bayford, Richard (2010) Tracking conductivity variations in the absence of accurate state evolution models in electrical impedance tomography. In: 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE), 2010. IEEE, pp. 1-6. ISBN 9781424447121
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Official URL: http://dx.doi.org/10.1109/ICBBE.2010.5518196
We present results on both linear and non-linear approaches in tracking conductivity variations in electrical impedance tomography. Throughout this study, we use both synthetic and measured data. The true system dynamics is considered as unknown and modelled as a random walk. In the linear reconstructions, the time evolution model is augmented with a Gaussian smoothness prior and results are shown using two different models for the covariance matrix of the process noise. Furthermore, we compare the reconstructions of the one step Gauss-Newton method to the Kalman filter on measured data from an adult human subject. In the non-linear study, we compare the performance of the extended Kalman filter against the particle filter on a simple test case. It is observed that the particle filter shows superior performance in tracking nonlinear/non-Gaussian conductivity variations.
|Item Type:||Book Section|
Date of Conference, 18-20 June 2010, Chengdu.
|Research Areas:||A. > School of Science and Technology > Natural Sciences|
A. > School of Science and Technology > Natural Sciences > Biophysics and Bioengineering group
|Deposited On:||07 Sep 2012 06:59|
|Last Modified:||26 Mar 2015 15:08|
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