Electrical impedance tomography reconstruction through simulated annealing with total least square error as objective function

• Published in: 2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society Vol. 2012; pp. 1518 - 1521
• Main Authors: Martins, Thiago de Castro, Tsuzuki, Marcos de Sales Guerra
• Format: Conference Proceeding Journal Article
• Language: English
• Published: United States IEEE 01-01-2012
• Subjects: Algorithms; Conductivity; Electric Impedance; Electric potential; Electrodes; Image Processing, Computer-Assisted - methods; Image reconstruction; Impedance; Least-Squares Analysis; Linear programming; Phantoms, Imaging; Reproducibility of Results; Tomography; Tomography - methods
• ISBN: 1424441196; 9781424441198
• ISSN: 1094-687X; 1557-170X; 1558-4615
• DOI: 10.1109/EMBC.2012.6346230

The EIT reconstruction problem can be solved as an optimization problem where the divergence 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 Finite Element Method (FEM) for simulation of the impedance domain. This combination has usually a very high computational cost, since SA requires an elevated number of objective function evaluations and those, obtained through FEM, are often expansive enough to make the whole process inviable. In here it is presented a new approach for EIT image reconstructions using SA and partial evaluations of objective functions based on overdetermined linear systems. This new reconstruction approach is evaluated with experimental data and compared with previous approaches.