Electrical impedance tomography reconstruction algorithm using extended Kalman filter

In electrical impedance tomography (EIT), the internal resistivity distribution of the unknown object is estimated using the boundary voltage data induced by different current patterns using various reconstruction algorithms. This paper presents a reconstruction algorithm based modified extended Kalman filter technique that is able to track fast change in the impedance distribution. The computer simulation for the 32 channels synthetic data shows that the reconstruction performance of the proposed scheme is improved compared to that of the conventional Kalman filter algorithm at the expense of slightly increased computational burden.

[1]  Willis J. Tompkins,et al.  Comparing Reconstruction Algorithms for Electrical Impedance Tomography , 1987, IEEE Transactions on Biomedical Engineering.

[2]  Mohinder S. Grewal,et al.  Kalman Filtering: Theory and Practice Using MATLAB , 2001 .

[3]  W Hou,et al.  [Electrical impedance tomography technology]. , 1999, Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation.

[4]  A. Segal,et al.  Regularized modified Newton‐Raphson technique applied to electrical impedance tomography , 1998 .

[5]  Jari P. Kaipio,et al.  A Kalman filter approach applied to the tracking of fast movements of organ boundaries , 1998, Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286).

[6]  P.A. Karjalainen,et al.  A Kalman filter approach to track fast impedance changes in electrical impedance tomography , 1998, IEEE Transactions on Biomedical Engineering.

[7]  Andy Adler,et al.  Electrical impedance tomography: regularized imaging and contrast detection , 1996, IEEE Trans. Medical Imaging.

[8]  Tadakuni Murai,et al.  Electrical Impedance Computed Tomography Based on a Finite Element Model , 1985, IEEE Transactions on Biomedical Engineering.

[9]  J.C. Newell,et al.  An electric current tomograph , 1988, IEEE Transactions on Biomedical Engineering.

[10]  Yves Goussard,et al.  Regularized reconstruction in electrical impedance tomography using a variance uniformization constraint , 1997, IEEE Transactions on Medical Imaging.