Title :
A first estimate for EEG/MEG dipole reconstructions
Author :
Theissen, A. ; Fuchs, M. ; Wischmann, H.A. ; Wagner, M. ; Drenckhahn, R. ; Kohler, Th.
Author_Institution :
Philips GmbH Forschungslab., Hamburg, Germany
fDate :
31 Oct-3 Nov 1996
Abstract :
The nonlinear parameters in the inverse problem of EEG/MEG dipole reconstructions are the dipoles´ locations. As soon as the considered data is noisy or more than one current dipole shall be modeled, the choice of a starting value for the minimizing algorithm is essential. We present a way of making a first guess that needs little computational effort because it does not take into account volume conductor models. The results are shown for four different measurement devices, with simulated data that contains one or two dipoles, and is subject to different noise levels
Keywords :
electroencephalography; inverse problems; magnetoencephalography; medical signal processing; EEG/MEG dipole reconstructions; current dipole; dipoles´ locations; inverse problem; measurement devices; minimizing algorithm; noise levels; nonlinear parameters; volume conductor models; Brain modeling; Computational modeling; Conductors; Current measurement; Electric variables measurement; Electrodes; Electroencephalography; Inverse problems; Magnetic field measurement; Noise measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-3811-1
DOI :
10.1109/IEMBS.1996.651988
