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  Internal ventilation system of MR scanners induces specific EEG artifact during simultaneous EEG-fMRI

Nierhaus, T., Gundlach, C., Goltz, D., Thiel, S., Pleger, B., & Villringer, A. (2013). Internal ventilation system of MR scanners induces specific EEG artifact during simultaneous EEG-fMRI. NeuroImage, 74, 70-76. doi:10.1016/j.neuroimage.2013.02.016.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-F524-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-8505-1
Genre: Journal Article

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 Creators:
Nierhaus, Till1, 2, 3, 4, Author              
Gundlach, Christopher1, Author              
Goltz, Dominique1, 5, Author              
Thiel, Sabrina1, 3, 6, Author              
Pleger, Burkhard1, 7, Author              
Villringer, Arno1, 2, 3, 4, 7, Author              
Affiliations:
1Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              
2Leipzig Research Center for Civilization Diseases (LIFE), University of Leipzig, Germany, ou_persistent22              
3Berlin School of Mind and Brain, Humboldt University Berlin, Germany, ou_persistent22              
4Berlin Neuroimaging Center, Charité University Medicine Berlin, Germany, ou_persistent22              
5Department of Experimental Psychology and Methods, University of Leipzig, Germany, ou_persistent22              
6Department of Mathematics, Humboldt University Berlin, Germany, ou_persistent22              
7Clinic for Cognitive Neurology, University of Leipzig, Germany, ou_persistent22              

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Free keywords: Simultaneous EEG-fMRI; Ventilation; Gradient artifact; Ballistocardiogram; Quantification; Gamma activity; Helium pump
 Abstract: During simultaneous EEG-fMRI acquisition, the EEG signal suffers from tremendous artifacts caused by the scanner “environment”. Particularly, gradient artifacts and the ballistocardiogram have been well characterized, along with methods to eliminate them. Here, we describe another systematic artifact in the EEG signal, which is induced by the internal ventilation system of Siemens TRIO and VERIO MR scanners. A ventilation-level dependent vibration induces specific peaks in the frequency spectrum of the EEG. These frequency peaks are in the range of physiologically relevant brain rhythms (gamma frequency range), and thus interfere with their reliable acquisition. This ventilation dependent artifact was most prominent on the electrodes placed directly on the subject's head, so it is not sufficient to simply place the EEG's amplifier outside the scanner tube. Instead, the ventilator must be switched off to fully eliminate the ventilator's artificial manipulation of EEG recordings. Without the internal ventilator system being on, the temperature within the scanner tube may rise, thus requiring shorter scanning sessions or an additional external ventilation system.

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Language(s): eng - English
 Dates: 2013-02-032013-02-192013-07-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.neuroimage.2013.02.016
PMID: 23435207
Other: Epub 2013
 Degree: -

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Title: NeuroImage
Source Genre: Journal
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Publ. Info: Orlando, FL : Academic Press
Pages: - Volume / Issue: 74 Sequence Number: - Start / End Page: 70 - 76 Identifier: ISSN: 1053-8119
CoNE: /journals/resource/954922650166