Direct EIT Reconstructions of Complex Admittivities on a Chest-Shaped Domain in 2-D

Electrical impedance tomography (EIT) is a medical imaging technique in which current is applied on electrodes on the surface of the body, the resulting voltage is measured, and an inverse problem is solved to recover the conductivity and/or permittivity in the interior. Images are then formed from...

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Bibliographic Details
Published in:IEEE transactions on medical imaging 2013-04, Vol.32 (4), p.757-769
Main Authors: Hamilton, S. J., Mueller, J. L.
Format: Article
Language:English
Subjects:
Algorithms
biomedical imaging
Computer Simulation
Conductivity
Electric Impedance
Electrodes
Humans
Image Processing, Computer-Assisted - methods
Image reconstruction
Models, Biological
Permittivity
Phantoms, Imaging
Pleural Effusion - pathology
Pneumothorax - pathology
Reconstruction algorithms
Thorax - anatomy & histology
Thorax - pathology
Tomography - instrumentation
Tomography - methods
Voltage measurement
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Description
Summary:Electrical impedance tomography (EIT) is a medical imaging technique in which current is applied on electrodes on the surface of the body, the resulting voltage is measured, and an inverse problem is solved to recover the conductivity and/or permittivity in the interior. Images are then formed from the reconstructed conductivity and permittivity distributions. In the 2-D geometry, EIT is clinically useful for chest imaging. In this work, an implementation of a D-bar method for complex admittivities on a general 2-D domain is presented. In particular, reconstructions are computed on a chest-shaped domain for several realistic phantoms including a simulated pneumothorax, hyperinflation, and pleural effusion. The method demonstrates robustness in the presence of noise. Reconstructions from trigonometric and pairwise current injection patterns are included.
ISSN:0278-0062
1558-254X
DOI:10.1109/TMI.2012.2237389