Title :
Correlation-based alignment of multichannel signals and application to paroxysmal events
Author :
Kalitzin, Stiliyan ; Zbijewski, Wojciech ; Parra, Jaime ; Velis, Demetrios ; Manshanden, Ilonka ; da Silva, Fernando Lopes
Author_Institution :
Dutch Epilepsy Clinics Found., Heemstede, Netherlands
Abstract :
We propose a new group-theoretical approach to the problem of alignment of time events in multichannel signal recordings. Such an alignment is an essential phase in the classification of transients in electroencephalogram/magnetoencephalogram (MEG) signals. A common reference frame is reconstructed applying a time translation transformation based on delayed mutual correlation functions of the individual events. The method is applied to MEG data sets recorded from epileptic patients showing paroxysmal interictal discharges.
Keywords :
diseases; electroencephalography; magnetoencephalography; medical signal processing; MEG data sets; common reference frame reconstruction; correlation-based alignment; delayed mutual correlation functions; epileptic patients; multichannel signals; paroxysmal events; paroxysmal interictal discharges; transients classification; Decision making; Delay effects; Distortion; Electroencephalography; Epilepsy; Interference; Physics; Signal resolution; Algorithms; Child; Electroencephalography; Epilepsy, Generalized; Female; Humans; Magnetoencephalography; Models, Neurological; Models, Statistical; Reproducibility of Results; Sensitivity and Specificity; Time Factors;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2002.802060
