Removal of Gradient Artefacts during Transient Head Movements for Continuous EEG-fMRI

José L. Ferreira, Ronald M. Aarts, Pierre J. M. Cluitmans

2014

Abstract

This paper presents a novel approach for removing gradient artefacts from the EEG signal recorded during continuous EEG-fMRI, which are influenced by transient head movements of the subject within the magnetic scanner. Transient head movements provoke abrupt changes in the gradient artefact waveform, in such a way that they compromise the estimation of an artefact waveform to be subtracted and achieve the EEG correction. According to our proposed methodology, a cubic spline waveform is used to model and represent the signal transitions components. This model is then used to change and approximate the shape of the EEG signal as homogeneous data, in order to improve the performance of the gradient artefact correction technique. The proposed approach also makes use of the signal slope adaption (SSD) method, combined with sum-of-sinusoids modelling for correction of the gradient artefact. Our methodology reveals to perform a robust and satisfactory removal of gradient artefacts under the occurrence of abrupt transient head movements.

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Paper Citation


in Harvard Style

L. Ferreira J., Aarts R. and J. M. Cluitmans P. (2014). Removal of Gradient Artefacts during Transient Head Movements for Continuous EEG-fMRI . In Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2014) ISBN 978-989-758-011-6, pages 213-220. DOI: 10.5220/0004802002130220


in Bibtex Style

@conference{biosignals14,
author={José L. Ferreira and Ronald M. Aarts and Pierre J. M. Cluitmans},
title={Removal of Gradient Artefacts during Transient Head Movements for Continuous EEG-fMRI},
booktitle={Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2014)},
year={2014},
pages={213-220},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004802002130220},
isbn={978-989-758-011-6},
}


in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2014)
TI - Removal of Gradient Artefacts during Transient Head Movements for Continuous EEG-fMRI
SN - 978-989-758-011-6
AU - L. Ferreira J.
AU - Aarts R.
AU - J. M. Cluitmans P.
PY - 2014
SP - 213
EP - 220
DO - 10.5220/0004802002130220