Abstract #3112
An optimized setup for simultaneous EEG-fMRI at ultra-high field in a head-only 7T scanner
Joao Jorge 1,2 , Frederic Grouiller 3 , Robert Stoermer 4 , Christoph Michel 5 , Patricia Figueiredo 2 , Wietske van der Zwaag 1 , and Rolf Gruetter 1
1
Center for Biomedical Imaging, University of
Lausanne/Ecole Polytechnique Federale de Lausanne,
Lausanne, Switzerland,
2
Institute
for Systems and Robotics, Instituto Superior Tecnico,
Universidade Tecnica de Lisboa, Lisbon, Portugal,
3
Department
of Radiology and Medical Informatics, Geneva University
Hospital, University of Geneva, Geneva, Switzerland,
4
Brain
Products, GmbH, Gilching, Germany,
5
Geneva
University Hospital, Geneva, Switzerland
Simultaneous EEG-fMRI acquisitions are prone to specific
artifacts that can seriously compromise data quality. In
particular, mechanically-propagated scanner vibrations
can significantly affect EEG recordings performed at
ultra-high fields. In this work, we explored the
advantages of a head-only MRI scanner for simultaneous
EEG-fMRI acquisition, at 7 Tesla, using an optimized EEG
setup with short cable lengths (~12cm from cap to
amplifiers). The effects of cable length and type on EEG
noise sensitivity were assessed. Following tests on
safety and MR image quality, simultaneous acquisitions
were performed on human subjects under visual
stimulation, yielding reliable VEPs and occipital BOLD
responses.
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