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Titolo:
IMPROVING SOURCE RECONSTRUCTIONS BY COMBINING BIOELECTRIC AND BIOMAGNETIC DATA
Autore:
FUCHS M; WAGNER M; WISCHMANN HA; KOHLER T; THEISSEN A; DRENCKHAHN R; BUCHNER H;
Indirizzi:
PHILIPS RES LABS,RONTGENSTR 24 D-22335 HAMBURG GERMANY RHEIN WESTFAL TH AACHEN,DEPT NEUROL D-52074 AACHEN GERMANY
Titolo Testata:
Electroencephalography and clinical neurophysiology
fascicolo: 2, volume: 107, anno: 1998,
pagine: 93 - 111
SICI:
0013-4694(1998)107:2<93:ISRBCB>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
LINEAR DISCRETIZATION; VOLUME CONDUCTOR; HEAD SHAPE; MODEL; LOCALIZATION; ORIGIN; MEG; EEG;
Keywords:
ELECTROENCEPHALOGRAM; MAGNETOENCEPHALOGRAM; SEP; SEF; SOURCE RECONSTRUCTION; REGULARIZATION; BOUNDARY ELEMENT METHOD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
M. Fuchs et al., "IMPROVING SOURCE RECONSTRUCTIONS BY COMBINING BIOELECTRIC AND BIOMAGNETIC DATA", Electroencephalography and clinical neurophysiology, 107(2), 1998, pp. 93-111

Abstract

Objectives: A framework for combining bioelectric and biomagnetic data is presented. The data are transformed to signal-to-noise ratios andreconstruction algorithms utilizing a new regularization approach areintroduced. Methods: Extensive simulations are carried out for 19 different EEG and MEG montages with radial and tangential test dipoles atdifferent eccentricities and noise levels. The methods are verified by real SEP/SEE measurements. A common realistic volume conductor is used and the less well known in vivo conductivies are matched by calibration to the magnetic data. Single equivalent dipole fits as well as spatio-temporal source models are presented for single and combined modality evaluations and overlaid to anatomic MR images. Results: Normalized sensitivity and dipole resolution profiles of the different EEG/MEGacquisition systems are derived from the simulated data. The methods and simulations are verified by simultaneously measured somatosensory data. Conclusions: Superior spatial resolution of the combined data studies is revealed, which is due to the complementary nature of both modalities and the increased number of sensors. A better understanding of the underlying neuronal processes can be achieved, since an improveddifferentiation between quasi-tangential and quasi-radial sources is possible. (C) 1998 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/03/20 alle ore 13:53:53