Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4331151 | Brain Research | 2007 | 5 Pages |
Abstract
We developed gradient magnetic-field topography (GMFT) for magnetoencephalography (MEG). We plotted the Euclidean norms of gradient magnetic fields occurring at the centers of 102 sensors onto 49-point grids and projected these norms onto the MRI brain surface of a 12-year-old boy who presented with neocortical epilepsy secondary to a left temporal tumor. The peak gradient magnetic field located posterior to the tumor and correlated to MEG dipoles. The gradient magnetic field propagated to the temporo-parietal region and corresponded with spike locations on electrocorticography. GMFT revealed the location and distribution of spikes while avoiding the inverse problem.
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Authors
Akira Hashizume, Koji Iida, Hiroshi Shirozu, Ryosuke Hanaya, Yoshihiro Kiura, Kaoru Kurisu, Hiroshi Otsubo,