Fast and Accurate EEG/MEG BEM-Based Forward Problem Solution for High-Resolution Head Models

A BEM (boundary element method) based approach is developed to accurately solve an EEG/MEG forward problem for a modern high-resolution head model in approximately 60 seconds using a common workstation. The method utilizes a charge-based BEM with fast multipole acceleration (BEM-FMM) and a "sma...

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Bibliographic Details
Published inbioRxiv : the preprint server for biology
Main Authors Wartman, William A, Nuñez Ponasso, Guillermo, Qi, Zhen, Haueisen, Jens, Maess, Burkhard, Knösche, Thomas R, Weise, Konstantin, Noetscher, Gregory M, Raij, Tommi, Makaroff, Sergey N
Format Journal Article
LanguageEnglish
Published United States 08.06.2024
Subjects
MEG Forward problem
5-Shell head models
Detailed head models
EEG Forward problem
b-Refinement
Boundary Element Fast Multipole Method (BEM-FMM)
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Summary:A BEM (boundary element method) based approach is developed to accurately solve an EEG/MEG forward problem for a modern high-resolution head model in approximately 60 seconds using a common workstation. The method utilizes a charge-based BEM with fast multipole acceleration (BEM-FMM) and a "smart" mesh pre-refinement (called -refinement) close to the singular source(s). No costly matrix-filling or direct solution steps typical for the standard BEM are required; the method generates on-skin voltages as well as MEG magnetic fields for high-resolution head models in approximately 60 seconds after initial model assembly. The method is verified both theoretically and experimentally.
DOI:10.1101/2024.06.07.598024