Imaging of conductivity changes and electrode movement in EIT

Physiological Measurement
M SoleimaniAndy Adler

Abstract

Electrical impedance tomography (EIT) attempts to reconstruct the internal impedance distribution in a medium from electrical measurements at electrodes on the medium surface. One key difficulty with EIT measurements is due to the position uncertainty of the electrodes, especially for medical applications, in which the body surface moves during breathing and posture change. In this paper, we develop a new approach which directly reconstructs both electrode movements and internal conductivity changes for difference EIT. The reconstruction problem is formulated in terms of a regularized inverse, using an augmented Jacobian, sensitive to impedance change and electrode movement. A reconstruction prior term is computed to impose a smoothness constraint on both the spatial distribution of impedance change and electrode movement. A one-step regularized imaging algorithm is then implemented based on the augmented Jacobian and smoothness constraint. Images were reconstructed using the algorithm of this paper with data from simulated 2D and 3D conductivity changes and electrode movements, and from saline phantom measurements. Results showed good reconstruction of the actual electrode movements, as well as a dramatic reduction in image ar...Continue Reading

References

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Citations

Aug 12, 2014·PloS One·Bartłomiej GrychtolAndy Adler
Jun 20, 2012·IEEE Transactions on Medical Imaging·Alistair BoyleWilliam R B Lionheart
Sep 26, 2008·IEEE Transactions on Medical Imaging·Ville KolehmainenPetri Ola
Jul 26, 2012·IEEE Transactions on Bio-medical Engineering·Damien FerrarioMarc Bodenstein
Aug 24, 2011·IEEE Transactions on Bio-medical Engineering·Doğa GürsoyHermann Scharfetter
Jan 18, 2012·IEEE Transactions on Medical Imaging·Camille Gómez-LabergeGerhard K Wolf
Sep 16, 2010·IEEE Transactions on Medical Imaging·Antti NissinenJari P Kaipio
May 18, 2016·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Shangjie Ren, Feng Dong
Jan 26, 2017·Medical Physics·Benjamin SchullckeKnut Moeller
Dec 25, 2013·The Journal of International Medical Research·Bin YangXiuzhen Dong
Jan 24, 2017·Physiological Measurement·A BoyleA Adler
Jul 18, 2017·IEEE Transactions on Bio-medical Engineering·Andy Adler, Alistair Boyle
Apr 26, 2006·Physiological Measurement·Andy Adler, William R B Lionheart
Aug 1, 2007·Physiological Measurement·Alzbeta E HartingerRobert Guardo
Jun 12, 2008·Physiological Measurement·Camille Gómez-Laberge, Andy Adler
Apr 9, 2014·Physiological Measurement·M G CrabbW R B Lionheart
May 27, 2015·Physiological Measurement·A BiguriM Soleimani
May 27, 2015·Physiological Measurement·Pascal O GaggeroVolker M Koch
Aug 18, 2016·Physiological Measurement·B SchullckeK Moeller
May 21, 2016·Physiological Measurement·Markus Jehl, David Holder
Oct 27, 2015·Physiological Measurement·Markus JehlTimo Betcke
Jun 8, 2011·Physiological Measurement·Andy Adler, William R B Lionheart
Apr 26, 2012·Physiological Measurement·Pascal Olivier GaggeroPeter Seitz
Jun 6, 2009·Physiological Measurement·Andy AdlerGerhard K Wolf
Jan 7, 2016·Medical & Biological Engineering & Computing·Ashkan JavaherianKnut Moeller

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