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A Reconstruction-Classification Method for Multifrequency Electrical Impedance Tomography

Malone, E; Dos Santos, GS; Holder, D; Arridge, S; (2015) A Reconstruction-Classification Method for Multifrequency Electrical Impedance Tomography. IEEE Transactions on Medical Imaging , 34 (7) pp. 1486-1497. Green open access

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Abstract

Multifrequency Electrical Impedance Tomography is an imaging technique which distinguishes biological tissues by their unique conductivity spectrum. Recent results suggest that the use of spectral constraints can significantly improve image quality. We present a combined reconstruction-classification method for estimating the spectra of individual tissues, whilst simultaneously reconstructing the conductivity. The advantage of this method is that a priori knowledge of the spectra is not required to be exact in that the constraints are updated at each step of the reconstruction. In this paper, we investigate the robustness of the proposed method to errors in the initial guess of the tissue spectra, and look at the effect of introducing spatial smoothing. We formalize and validate a frequency-difference variant of reconstruction-classification, and compare the use of absolute and frequency-difference data in the case of a phantom experiment.

Type: Article
Title: A Reconstruction-Classification Method for Multifrequency Electrical Impedance Tomography
Open access status: An open access version is available from UCL Discovery
Publisher version: http://dx.doi.org/10.1109/TMI.2015.2402661
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1470401
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