Combination of boundary element method and finite element method in diffuse optical tomography.
IEEE Trans Biomed Eng
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.
|Title:||Combination of boundary element method and finite element method in diffuse optical tomography.|
|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
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