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An automated procedure for deriving realistic volume conductor models for MEG / EEG source localization
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ent, Dennis Van’t Munck, Jan C. De Kaas, Amanda L. Dijk, Bob W. Van |
| Copyright Year | 2001 |
| Abstract | The problem to find a fast, but accurate, triangulation of a subjects skin, skull and brain (SSB) for E/MEG source reconstruction is solved. The method is based on a description of volume conductor surfaces with spherical harmonic expansions and a database of exactly segmented surfaces. With the proposed procedure, relevant SSB compartments can be measured from magnetic resonance (MR) images of the head. In addition, a method is presented to obtain an estimate of SSB surfaces when MR data is not available. For this purpose, first a surface harmonic expansion of the skin is obtained from headshape data obtained with a 3-D digitizer. Skull and brain segmentations then can be computed from a linear relationship between spherical harmonic coefficients of the skin volume and skull and brain compartments, respectively. The linear prediction model is derived from spherical harmonic expansions of the surfaces in the segmentation database. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://biomag2000.hut.fi/papers/0611.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
