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  Carbon-wire loop based artifact correction outperforms post-processing EEG/fMRI corrections: A validation of a real-time simultaneous EEG/fMRI correction method

van der Meer, J. N., Pampel, A., Van Someren, E. J. W., Ramautar, J. R., van der Werf, Y. D., Gomez-Herrero, G., et al. (2016). Carbon-wire loop based artifact correction outperforms post-processing EEG/fMRI corrections: A validation of a real-time simultaneous EEG/fMRI correction method. NeuroImage, 125, 880-894. doi:10.1016/j.neuroimage.2015.10.064.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-79BE-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-1D12-9
Genre: Journal Article

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van der Meer, Johan N.1, 2, 3, 4, Author
Pampel, André5, Author              
Van Someren, Eus J. W.6, 7, Author
Ramautar, Jennifer R.6, Author
van der Werf, Ysbrand D.4, 7, 8, Author
Gomez-Herrero, German6, Author
Lepsien, Jöran5, Author              
Hellrung, Lydia9, Author
Hinrichs, Hermann3, Author
Möller, Harald E.5, Author              
Walter, Martin1, 2, 10, Author
Affiliations:
1Clinical Affective Neuroimaging Laboratory (CANLAB), Otto von Guericke University Magdeburg, Germany, ou_persistent22              
2Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany, ou_persistent22              
3Department of Neurology, Otto von Guericke University Magdeburg, Germany, ou_persistent22              
4Department of Medical Psychology, Center for Neurogenomics and Cognitive Research (CNCR), VU University Medical Center, Amsterdam, the Netherlands, ou_persistent22              
5Methods and Development Unit Nuclear Magnetic Resonance, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634558              
6Department of Sleep and Cognition, The Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences, Amsterdam, the Netherlands, ou_persistent22              
7Department of Integrative Neurophysiology, Center for Neurogenomics and Cognitive Research (CNCR), VU University Medical Center, Amsterdam, the Netherlands, ou_persistent22              
8Department of Cognition and Emotion, The Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences, Amsterdam, the Netherlands, ou_persistent22              
9Neuroimaging Center, TU Dresden, Germany, ou_persistent22              
10Department of Psychiatry, Otto von Guericke University Magdeburg, Germany, ou_persistent22              

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 Abstract: Simultaneous EEG-fMRI combines two powerful neuroimaging techniques, but the EEG signal suffers from severe artifacts in the MRI environment that are difficult to remove. These are the MR scanning artifact and the blood-pulsation artifact — strategies to remove them are a topic of ongoing research. Additionally large, unsystematic artifacts are produced across the full frequency spectrum by the magnet's helium pump (and ventilator) systems which are notoriously hard to remove. As a consequence, experimenters routinely deactivate the helium pump during simultaneous EEG-fMRI acquisitions which potentially risks damaging the MRI system and necessitates more frequent and expensive helium refills. We present a novel correction method addressing both helium pump and ballisto-cardiac (BCG) artifacts, consisting of carbon-wire loops (CWL) as additional sensors to accurately track unpredictable artifacts related to subtle movements in the scanner, and an EEGLAB plugin to perform artifact correction. We compare signal-to-noise metrics of EEG data, corrected with CWL and three conventional correction methods, for helium pump off and on measurements. Because the CWL setup records signals in real-time, it fits requirements of applications where immediate correction is necessary, such as neuro-feedback applications or stimulation time-locked to specific sleep oscillations. The comparison metrics in this paper relate to: (1) the EEG signal itself, (2) the “eyes open vs. eyes closed” effect, and (3) an assessment of how the artifact corrections impacts the ability to perform meaningful correlations between EEG alpha power and the BOLD signal. Results show that the CWL correction corrects for He pump artifact and also produces EEG data more comparable to EEG obtained outside the magnet than conventional post-processing methods.

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Language(s): eng - English
 Dates: 2015-02-112015-10-022015-10-242016-01-15
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.neuroimage.2015.10.064
PMID: 26505301
Other: Epub 2015
 Degree: -

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Title: NeuroImage
Source Genre: Journal
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Publ. Info: Orlando, FL : Academic Press
Pages: - Volume / Issue: 125 Sequence Number: - Start / End Page: 880 - 894 Identifier: ISSN: 1053-8119
CoNE: /journals/resource/954922650166