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Projection Error Propagation-based Regularization (PEPR) method for resistivity reconstruction in Electrical Impedance Tomography (EIT)

Bera, Tushar Kanti and Biswas, Samir Kumar and Rajan, K and Nagaraju, J (2014) Projection Error Propagation-based Regularization (PEPR) method for resistivity reconstruction in Electrical Impedance Tomography (EIT). In: MEASUREMENT, 49 . pp. 329-350.

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Official URL: http://dx.doi.org/10.1016/j.measurement.2013.11.00...

Abstract

A novel Projection Error Propagation-based Regularization (PEPR) method is proposed to improve the image quality in Electrical Impedance Tomography (EIT). PEPR method defines the regularization parameter as a function of the projection error developed by difference between experimental measurements and calculated data. The regularization parameter in the reconstruction algorithm gets modified automatically according to the noise level in measured data and ill-posedness of the Hessian matrix. Resistivity imaging of practical phantoms in a Model Based Iterative Image Reconstruction (MoBIIR) algorithm as well as with Electrical Impedance Diffuse Optical Reconstruction Software (EIDORS) with PEPR. The effect of PEPR method is also studied with phantoms with different configurations and with different current injection methods. All the resistivity images reconstructed with PEPR method are compared with the single step regularization (STR) and Modified Levenberg Regularization (LMR) techniques. The results show that, the PEPR technique reduces the projection error and solution error in each iterations both for simulated and experimental data in both the algorithms and improves the reconstructed images with better contrast to noise ratio (CNR), percentage of contrast recovery (PCR), coefficient of contrast (COC) and diametric resistivity profile (DRP). (C) 2013 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the ELSEVIER SCI LTD, ENGLAND
Keywords: Electrical Impedance Tomography (EIT); Projection Error Propagation-based Regularization (PEPR); Model Based Iterative Image Reconstruction (MoBIIR); EIDORS; STR; LMR; Image analysis; NaCl-Nylon phantom; Chicken tissue phantom
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 10 Mar 2014 07:27
Last Modified: 10 Mar 2014 07:27
URI: http://eprints.iisc.ac.in/id/eprint/48543

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