Individual FEM head model

Create individual FEM head models with BESA MRI

Individual, realistic volume conductor models improve EEG and MEG source analysis accuracy. BESA MRI in combination with BESA Research offer a complete pipeline for creating and using individual, realistically shaped head models for EEG and MEG source analysis. Minimal user interaction is required, and computation speed is highly optimized.

FEM head model computation in BESA MRI and use in BESA Research

• Segmentation of skin, skull, CSF and brain based on MRI grey values and tissue probability atlas
• Geometry-adapted hexahedral FE-mesh generation
• Forward computation for individual source space and given electrode / sensor configuration

Improved source localization of epileptic spike and auditory activity with individual FEM

Basal temporal lobe epilepsy – dipole sources reconstructed from the interictal EEG. Green: 4-shell ellipsoidal model; blue: standard FEM model; red: individual FEM model	Auditory N1 – Heschl’s Gyrus activity. Green: 4-shell ellipsoidal model; red: individual FEM model

Download poster on BESA FEM pipeline

Individual FEM pipeline for EEG source analysis requiring minimal user intervention – OHBM meeting 2014