Dipole location errors in electroencephalogram source analysis due to volume conductor model errors.
作者： B. Vanrumste , G. Van Hoey , R. Van de Walle , M. D'Havé , I. Lemahieu
DOI: 10.1007/BF02345748
关键词: Electrical engineering 、 Finite difference method 、 Conductor 、 Dipole 、 Volume (thermodynamics) 、 Test object 、 Radial direction 、 Physics 、 Skull conductivity 、 Skull 、 Geometry
摘要: An examination is made of dipole location errors in electroencephalogram (EEG) source analysis, due to not incorporating the ventricular system (VS), omitting a hole skull and underestimating conductivity. The simulations are performed for large number test dipoles 3D using finite difference method. maximum error encountered, utilising 27 53 electrodes 7.6 mm 6.1 mm, respectively when VS, 5.6 5.2 neglecting skull, 33.4 28.0 largest VS can be found vicinity VS. erros hole. At these positions fitted close When conductivity underestimated, skull-brain border radial direction all dipoles. It was that typically higher than those or skull.
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