Title :
Regularized FOCUSS algorithm for EEG/MEG source imaging
Author :
Han, Jooman ; Park, Kwang Suk
Author_Institution :
Interdisciplinary Program in Biomedical Eng., Seoul Nat. Univ., South Korea
Abstract :
We derived a generalized version of the regularized FOCUSS algorithm which was derived in a paper by Phillips, JW et al., (1997). It allows general forms of noise covariance and reduces depth effect when imaging focal neural sources from electroencephalography (EEG) / magnetoencephalography (MEG) data. We compared a depth-weighted regularized algorithm with FOCUSS and a regularized FOCUSS through simulation study. The suggested algorithm gave sparser and less spurious solutions than the others.
Keywords :
electroencephalography; magnetoencephalography; medical signal processing; neurophysiology; depth-weighted regularized algorithm; electroencephalography; focal neural source imaging; magnetoencephalography; noise covariance; Bayesian methods; Biomedical engineering; Brain modeling; Current measurement; Electroencephalography; Focusing; Inverse problems; Iterative algorithms; Magnetic field measurement; Magnetic heads; Dipole; electroencephalography; inverse problem; regularization; sparse;
Conference_Titel :
Engineering in Medicine and Biology Society, 2004. IEMBS '04. 26th Annual International Conference of the IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-8439-3
DOI :
10.1109/IEMBS.2004.1403106
