Name
Abstract | ||
|---|---|---|
In studies of EEG/MEG problems involving cortical sources, the cortex may be modeled by a 2-D manifold inside the brain. In
such cases the primary or impressed current density over this manifold is usually approximated by a set of dipolar sources
located at the vertices of the cortical surface tessellation. In this study, we analyze the different errors induced by this
approximation on the EEG/MEG forward problem. Our results show that in order to obtain more accurate solutions of the forward
problems with the multiple dipoles approximation, the moments of the dipoles should be weighted by the area of the surrounding
triangles, or using an alternative approximation of the primary current as a constant or linearly varying current density
over plane triangular elements of the cortical surface tessellation. This should be taken into account when computing the
lead field matrix for solving the EEG/MEG inverse problem in brain imaging methods. |
Year | DOI | Venue |
|---|---|---|
2009 | 10.1007/s11517-009-0529-x | Med. Biol. Engineering and Computing |
Keywords | Field | DocType |
brain imaging,current density,inverse problem,boundary element | Mathematical analysis,Matrix (mathematics),Inverse problem,Artificial intelligence,Tessellation,Geometry,Electroencephalography,Manifold,Current density,Computer vision,Vertex (geometry),Boundary element method,Mathematics | Journal |
Volume | Issue | ISSN |
47 | 10 | 1741-0444 |
Citations | PageRank | References |
3 | 0.50 | 7 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Nicolás von Ellenrieder | 1 | 20 | 4.13 |
| Pedro A Valdés-Hernández | 2 | 50 | 5.01 |
| C. Muravchik | 3 | 543 | 68.59 |