Increasing electrical impedance tomography system performance through the topology optimization method combined with probabilistic methods

• Grant number: 05/00270-1
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): October 01, 2005
• Effective date (End): September 30, 2009
• Field of knowledge: Engineering - Biomedical Engineering
• Principal Investigator: Emílio Carlos Nelli Silva
• Grantee: Luis Augusto Motta Mello
• Home Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

An Electrical Impedance Tomography (EIT) device allows us to obtain images of the interior of a body through electric potential measurements in the electrodes on the contour of the body, when a current density is applied to an electrode following a load (or current) pattern. Uncertainties due to external influences and measurement devices are associated with the potential values. Other sources of uncertainties can be found related, for instance, to applied electrical currents. Therefore, the image will be associated with a reliability level, that is, there will be a probability of the image to represent the interior of body. In his Master of Science’s work, the author implemented a deterministic algorithm based on Topology Optimization Method (TOM) applied to obtain three-dimensional EIT images. This work encouraged further studies on related topics. The mentioned uncertain nature of the variables, previously neglected, had motivated a new study. Therefore, the objective of this project is to study TOM based on probabilistic methods to obtain reliable TIE images, given the inherent uncertainties.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MOTTA MELLO, LUIS AUGUSTO; DE STURLER, ERIC; PAULINO, GLAUCIO H.; NELLI SILVA, EMILIO CARLOS. Recycling Krylov subspaces for efficient large-scale electrical impedance tomography. COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, v. 199, n. 49-52, p. 3101-3110, 2010. Web of Science Citations: 11.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

MELLO, Luis Augusto Motta. Estudo do aumento do desempenho de um sistema de tomografia de impedância elétrica através do método de otimização topológica.. 2010. Doctoral Thesis - Universidade de São Paulo (USP). Escola Politécnica São Paulo.