Localization of spontaneous magnetoencephalographic activity of neonates and fetuses using independent component and Hilbert phase analysis

Srinivasan Vairavan, Hari Eswaran, Hubert Preissl, James D Wilson, Naim Haddad, Curtis L Lowery, Rathinaswamy B Govindan
2010 2010 Annual International Conference of the IEEE Engineering in Medicine and Biology  
The fetal magnetoencephalogram (fMEG) is measured in the presence of large interference from maternal and fetal magnetocardiograms (mMCG and fMCG). These cardiac interferences can be attenuated by orthogonal projection (OP) technique of the corresponding spatial vectors. However, the OP technique redistributes the fMEG signal among the channels and also leaves some cardiac residuals (partially attenuated mMCG and fMCG) due to loss of stationarity in the signal. In this paper, we propose a novel
more » ... way to extract and localize the neonatal and fetal spontaneous brain activity by using independent component analysis (ICA) technique. In this approach, we perform ICA on a small subset of sensors for 1-min duration. The independent components obtained are further investigated for the presence of discontinuous patterns as identified by the Hilbert phase
doi:10.1109/iembs.2010.5626753 pmid:21096327 pmcid:PMC3102006 fatcat:ld3mmfuxwfau5l4kvci5fxlxxe