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Estimating cortical potentials from scalp EEGs in a realistically shaped inhomogeneous head model by means of the boundary element method

1999; Institute of Electrical and Electronics Engineers; Volume: 46; Issue: 10 Linguagem: Inglês

10.1109/10.790505

1558-2531

Bin He, Yunhua Wang, Dongsheng Wu,

Advanced MRI Techniques and Applications

Cortical potentials are estimated from scalp potentials using a realistically shaped inhomogeneous head model, by means of the boundary element method (BEM). A new adaptive algorithm has been developed to achieve high accuracy to link directly the cortical potentials to the scalp potentials in a realistically shaped inhomogeneous head model including the thin low-conductivity skull layer. Computer simulations using a concentric three-spheres head model have tested this approach. The present study demonstrates that the cortical potentials can be directly estimated from the scalp potentials using the BEM in a realistically shaped inhomogeneous head model.