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Combination of boundary element method and finite element method in diffuse optical tomography.

Elisee, JP; Gibson, A; Arridge, S; (2010) Combination of boundary element method and finite element method in diffuse optical tomography. IEEE Trans Biomed Eng , 57 (11) 10.1109/TBME.2010.2055868.

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Abstract

This paper presents a new numerical method for optical tomography: the combined boundary element/finite element method (BEM-FEM), designed to tackle reconstructions in layered turbid media. The BEM-FEM focuses on the region of interest by creating a volume mesh and reconstructing in this region only. All other regions are treated as piecewise-constant in a surface-integral approach. We validate the model in concentric spheres, with different positions of the volume-integral treated area and found it compared well with an analytical result. We then performed functional imaging of the neonates motor cortex in vivo, in a reconstruction restricted to the brain, both with FEM and BEM-FEM. These results show the effectiveness of the BEMFEM in situations where the organ of interest is surrounded by superficial layers.

Type: Article
Title: Combination of boundary element method and finite element method in diffuse optical tomography.
Location: United States
DOI: 10.1109/TBME.2010.2055868
Keywords: Computer Simulation, Finite Element Analysis, Humans, Imaging, Three-Dimensional, Infant, Newborn, Models, Biological, Motor Cortex, Reproducibility of Results, Tomography, Optical
UCL classification: UCL > School of BEAMS > Faculty of Engineering Science
UCL > School of BEAMS > Faculty of Engineering Science > Computer Science
UCL > School of BEAMS > Faculty of Engineering Science > Medical Physics and Bioengineering
URI: http://discovery.ucl.ac.uk/id/eprint/1301602
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