Imaging cardiac activity by the D-bar method for electrical impedance tomography

A practical D-bar algorithm for reconstructing conductivity changes from EIT data taken on electrodes in a 2D geometry is described. The algorithm is based on the global uniqueness proof of Nachman (1996 Ann. Math. 143 71-96) for the 2D inverse conductivity problem. Results are shown for reconstruct...

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Bibliographic Details
Published in:	Physiological measurement Vol. 27; no. 5; p. S43
Main Authors:	Isaacson, D, Mueller, J L, Newell, J C, Siltanen, S
Format:	Journal Article
Language:	English
Published:	England 01-05-2006
Subjects:	Algorithms Cardiography, Impedance - methods Electric Impedance Heart - anatomy & histology Heart - physiology Humans Image Enhancement - methods Image Interpretation, Computer-Assisted - methods Phantoms, Imaging Plethysmography, Impedance - methods Reproducibility of Results Sensitivity and Specificity Tomography - methods
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Summary:	A practical D-bar algorithm for reconstructing conductivity changes from EIT data taken on electrodes in a 2D geometry is described. The algorithm is based on the global uniqueness proof of Nachman (1996 Ann. Math. 143 71-96) for the 2D inverse conductivity problem. Results are shown for reconstructions from data collected on electrodes placed around the circumference of a human chest to reconstruct a 2D cross-section of the torso. The images show changes in conductivity during a cardiac cycle.
ISSN:	0967-3334
DOI:	10.1088/0967-3334/27/5/S04