Optimal reduction of MCG in fetal MEG recordings

Recording fetal magnetoencephalographic (fMEG) signals in-utero is a demanding task due to biological interference, especially maternal and fetal magnetocardiographic (MCG) signals. A method based on orthogonal projection of MCG signal space vectors (OP) was evaluated and compared with independent c...

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Bibliographic Details
Published in:IEEE transactions on biomedical engineering 2006-08, Vol.53 (8), p.1720-1724
Main Authors: McCubbin, J., Robinson, S.E., Cropp, R., Moiseev, A., Vrba, J., Murphy, P., Preissl, H., Eswaran, H.
Format: Article
Language:English
Subjects:
Algorithms
Attenuation
Bandwidth
Biomagnetics
Biomedical signal processing
Computer Simulation
Diagnosis, Computer-Assisted - methods
Female
Fetal heart
Fetal Monitoring - methods
Gynaecology
Humans
Independent component analysis
Interference suppression
Magnetoencephalography
Magnetoencephalography - methods
Models, Neurological
Models, Statistical
Pregnancy
Principal Component Analysis
Signal processing
Signal Processing, Computer-Assisted
Signal to noise ratio
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Summary:Recording fetal magnetoencephalographic (fMEG) signals in-utero is a demanding task due to biological interference, especially maternal and fetal magnetocardiographic (MCG) signals. A method based on orthogonal projection of MCG signal space vectors (OP) was evaluated and compared with independent component analysis (ICA). The evaluation was based on MCG amplitude reduction and signal-to-noise ratio of fetal brain signals using exemplary datasets recorded during ongoing studies related to auditory evoked fields. The results indicate that the OP method is the preferable approach for attenuation of MCG and for preserving the fetal brain signals in fMEG recordings
ISSN:0018-9294
1558-2531
DOI:10.1109/TBME.2006.876619