Title :
A hybrid ICA-Hermite transform for removal of Ballistocardiogram from EEG
Author :
Ferdowsi, Saideh ; Sanei, Saeid ; Nottage, Judith ; O´Daly, Owen ; Abolghasemi, Vahid
Author_Institution :
Fac. of Eng. & Phys. Sci., Univ. of Surrey, Guildford, UK
Abstract :
In this paper the problem of removing Ballistocardiogram (BCG) artifact from EEG signal is addressed. BCG removal is an important task in analysis of simultaneous EEG-fMRI data. We propose a new method by combining independent component analysis (ICA) and discrete Hermite transform (DHT) for this purpose. Discrete Hermite transform is a powerful technique which is able to model a signal with no assumption about its shape. This feature makes DHT an appropriate tool to be combined with ICA for removing the BCG artifact. We show that the proposed hybrid ICA-Hermite transform can compensate for the existing drawbacks of the two methods, when applied separately. A significant improvement over conventional methods is demonstrated with synthetic data, and supported by preliminary work with real EEG.
Keywords :
discrete transforms; electroencephalography; independent component analysis; medical signal processing; BCG removal; DHT; EEG signal; ballistocardiogram artifact; discrete Hermite transform; hybrid ICA-Hermite transform; independent component analysis; simultaneous EEG-fMRI data; Brain modeling; Electrocardiography; Electroencephalography; Independent component analysis; Magnetic resonance imaging; Shape; Transforms; Artifact removal; Ballistocardiogram; Discrete Hermite transform; Independent component analysis;
Conference_Titel :
Signal Processing Conference (EUSIPCO), 2012 Proceedings of the 20th European
Conference_Location :
Bucharest
Print_ISBN :
978-1-4673-1068-0