Advanced search
Start date
Betweenand

Reconstruction of electrical impedance tomography images by simulated annealing using the quadratic global error of overdetermined systems as objective function

Grant number: 12/04902-6
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): May 01, 2012
Effective date (End): April 30, 2013
Field of knowledge:Engineering - Biomedical Engineering - Medical Engineering
Principal Investigator:Thiago de Castro Martins
Grantee:Gustavo Vilela Momenté
Home Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Electrical Impedance Tomography is a non-invasive technique for obtaining images of the interior of a body. The image reconstruction can be approached as an optimization problem that looks for the maximization of the consistency between the behaviour of a parametrized model of the body and physical measurements. This optimization problem is non-linear and non-convex, and its solution usually involves a great computational cost, as the evaluation of the objective function at each iteration involves the simulation of the parametrized model, usually through the Finite Element Method. The goal of this project is to create a new objective function that admits an iterative evaluation at low computational cost.