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Fast Multipole Method for the Symmetric Boundary Element Method in MEG/EEG

Jan Kybic 1 Maureen Clerc 2 Olivier Faugeras 2 Renaud Keriven 2 Théodore Papadopoulo 2
2 ODYSSEE - Computer and biological vision
DI-ENS - Département d'informatique - ENS Paris, CRISAM - Inria Sophia Antipolis - Méditerranée , ENS-PSL - École normale supérieure - Paris, Inria Paris-Rocquencourt, ENPC - École des Ponts ParisTech
Abstract : The accurate solution of the forward electrostatic problem is an essential first step before solving the inverse problem of magneto- and electro-encephalography (MEG/EEG). The symmetric Galerkin boundary element method is accurate but is difficule to use for very large problems because of its computational complexity and memory requirements. We describe a fast multipole-based acceleration for the symmetric BEM with complexity. It creates a hierarchical structure of the elements and approximates far interactions using spherical harmonics expansions. The accelerated method is shown to be as accurate as the direct method, yet for large problems it is both faster and more economical in terms of memory consumption.
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Submitted on : Friday, May 19, 2006 - 8:57:31 PM
Last modification on : Thursday, March 17, 2022 - 10:08:31 AM
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  • HAL Id : inria-00070591, version 1



Jan Kybic, Maureen Clerc, Olivier Faugeras, Renaud Keriven, Théodore Papadopoulo. Fast Multipole Method for the Symmetric Boundary Element Method in MEG/EEG. [Research Report] RR-5415, INRIA. 2006, pp.34. ⟨inria-00070591⟩



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