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Authors: Antje Bock 1 ; Andrea A. Kühn 1 ; Lutz Trahms 2 and Tilmann H. Sander 2

Affiliations: 1 Charité Berlin, Germany ; 2 Physikalisch-Technische Bundesanstalt, Germany

ISBN: 978-989-8425-89-8

Keyword(s): Magnetoencephalography, Deep brain stimulation, Local field potentials, Cardiac cycle artefact, Principal component analysis, Signal space projection, Coherence.

Related Ontology Subjects/Areas/Topics: Applications and Services ; Biomedical Engineering ; Biomedical Signal Processing ; Computer Vision, Visualization and Computer Graphics ; Electromagnetic Fields in Biology and Medicine ; Informatics in Control, Automation and Robotics ; Medical Image Detection, Acquisition, Analysis and Processing ; Signal Processing, Sensors, Systems Modeling and Control ; Time and Frequency Response ; Time-Frequency Analysis

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.

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Paper citation in several formats:
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

@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},
}

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

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