CARDIAC CYCLE ARTEFACT REMOVAL IN MAGNETOENCEPHALOGRAPHIC DATA OF PATIENTS WITH DEEP BRAIN ELECTRODES - Implementation of Simultaneous Magnetoencephalographic and Local Field Potential Recordings

Antje Bock, Andrea A. Kühn, Lutz Trahms, Tilmann H. Sander

Abstract

Simultaneous magnetoencephalography (MEG) and local field potential (LFP) recordings in patients undergoing deep brain stimulation (DBS) for severe movement disorders is a promising technique both for clinical applications and basic research. Recordings can be accomplished during the time interval between electrode insertion and implantation of the stimulator while electrodes are externalised. At present, strong cardiac cycle artefacts (CCA) are observed in theMEG signals around the area, where the disposable stainless steel electrode wires leave the skull. The CCA refers to the remanent magnetic field of those wires underneath the sensors, which are moved by local pulsations of the blood vessels. Here, we demonstrate a new approach to partially remove the CCA by applying principal component analysis (PCA) to an averaged CCA and subsequent signal space projection (SSP) method. Further steps of analysis such as coherence calculations are less distorted after SSP.

References

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Paper Citation


in Harvard Style

Bock A., Kühn A., Trahms L. and Sander T. (2012). CARDIAC CYCLE ARTEFACT REMOVAL IN MAGNETOENCEPHALOGRAPHIC DATA OF PATIENTS WITH DEEP BRAIN ELECTRODES - Implementation of Simultaneous Magnetoencephalographic and Local Field Potential Recordings . In Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2012) ISBN 978-989-8425-89-8, pages 325-328. DOI: 10.5220/0003706703250328


in Bibtex Style

@conference{biosignals12,
author={Antje Bock and Andrea A. Kühn and Lutz Trahms and Tilmann H. Sander},
title={CARDIAC CYCLE ARTEFACT REMOVAL IN MAGNETOENCEPHALOGRAPHIC DATA OF PATIENTS WITH DEEP BRAIN ELECTRODES - Implementation of Simultaneous Magnetoencephalographic and Local Field Potential Recordings},
booktitle={Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2012)},
year={2012},
pages={325-328},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003706703250328},
isbn={978-989-8425-89-8},
}


in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2012)
TI - CARDIAC CYCLE ARTEFACT REMOVAL IN MAGNETOENCEPHALOGRAPHIC DATA OF PATIENTS WITH DEEP BRAIN ELECTRODES - Implementation of Simultaneous Magnetoencephalographic and Local Field Potential Recordings
SN - 978-989-8425-89-8
AU - Bock A.
AU - Kühn A.
AU - Trahms L.
AU - Sander T.
PY - 2012
SP - 325
EP - 328
DO - 10.5220/0003706703250328