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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Interval Simulated Annealing applied to Electrical Impedance Tomography image reconstruction with fast objective function evaluation

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Author(s):
Martins, Thiago de Castro ; Guerra Tsuzuki, Marcos de Sales ; Bueno de Camargo, Erick Dario Leon ; Lima, Raul Gonzalez ; de Moura, Fernando Silva ; Passos Amato, Marcelo Brito
Total Authors: 6
Document type: Journal article
Source: COMPUTERS & MATHEMATICS WITH APPLICATIONS; v. 72, n. 5, p. 1230-1243, SEP 2016.
Web of Science Citations: 3
Abstract

The Electrical Impedance Tomography (EIT) reconstruction problem can be solved as an optimization problem in which the discrepancy between a simulated impedance domain and the observed one is minimized. This optimization problem can be solved by a combination of Simulated Annealing (SA) for optimization and the Finite Element Method (FEM) for simulating the impedance domain. A new objective function based on the total least squares error minimization is proposed. This objective function is ill-conditioned with dense meshes. Two possibilities to overcome ill-conditioning are considered: combination with another objective function (Euclidean distance) and inclusion of a regularization term. To speed up the algorithm, results from previous iterations are used to improve the present iteration convergence, and a preconditioner is proposed. This new reconstruction approach is evaluated with experimental data and compared with previous approaches. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 08/07150-0 - Non linear state estimation using the unscented Kalman filter in electrical impedance tomography
Grantee:Fernando Silva de Moura
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 10/19380-0 - Simulated annealing with partial evaluation of objective function applied to electric impedance tomography
Grantee:Thiago de Castro Martins
Support Opportunities: Regular Research Grants
FAPESP's process: 09/07173-2 - Applying the simulated annealing to the electrical impedance tomography aiming the determination of absolute images
Grantee:Marcos de Sales Guerra Tsuzuki
Support Opportunities: Regular Research Grants