A Kalman filter approach to track fast impedance changes in electrical impedance tomography

IEEE Transactions on Bio-medical Engineering
M VauhkonenJ P Kaipio

Abstract

In electrical impedance tomography (EIT), an estimate for the cross-sectional impedance distribution is obtained from the body by using current and voltage measurements made from the boundary. All well-known reconstruction algorithms use a full set of independent current patterns for each reconstruction. In some applications, the impedance changes may be so fast that information on the time evolution of the impedance distribution is either lost or severely blurred. In this paper, we propose an algorithm for EIT reconstruction that is able to track fast changes in the impedance distribution. The method is based on the formulation of EIT as a state-estimation problem and the recursive estimation of the state with the aid of the Kalman filter. The performance of the proposed method is evaluated with a simulation of human thorax in a situation in which the impedances of the ventricles change rapidly. We show that with optimal current patterns and proper parameterization, the proposed approach yields significant enhancement of the temporal resolution over the conventional reconstruction strategy.

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Citations

Jul 18, 2008·Medical & Biological Engineering & Computing·Tao DaiAndy Adler
Apr 26, 2006·Physiological Measurement·Bong Seok KimGary J Saulnier
Jun 3, 2014·BMC Medical Informatics and Decision Making·Jerome FoussierSteffen Leonhardt
Feb 16, 2008·International Journal of Biomedical Imaging·Yair GranotBoris Rubinsky
Jan 20, 2015·International Journal for Numerical Methods in Biomedical Engineering·M Fernández-CorazzaC H Muravchik
Oct 1, 2009·IEEE Transactions on Bio-medical Engineering·Fernando Silva MouraRaul Gonzalez Lima
May 19, 2009·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Mark D ButalaFarzad Kamalabadi
Mar 6, 2004·IEEE Transactions on Bio-medical Engineering·Keith L BerrierDirar S Khoury
Aug 9, 2002·IEEE Transactions on Medical Imaging·Nick PolydoridesHugh McCann
Jan 16, 2004·IEEE Transactions on Bio-medical Engineering·Flávio Celso TrigoMarcelo Brito Passos Amato
Jan 16, 2004·IEEE Transactions on Bio-medical Engineering·Birsen Saka, Atila Yilmaz
Feb 16, 2005·IEEE Transactions on Bio-medical Engineering·Eugene DemidenkoKeith D Paulsen
May 18, 2016·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Kent Hsin-Yu WeiKen Primrose
Jan 26, 2017·Medical Physics·Benjamin SchullckeKnut Moeller
Jun 24, 2003·Physics in Medicine and Biology·Simon PrinceSimon R Arridge
Mar 10, 2004·Physiological Measurement·William R B Lionheart
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