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Abstract #2714

Simultaneous EEG-FMRI: Evaluating the Effect of the Cabling Configuration on the Gradient Artefact.

Muhammad E.H. Chowdhury1, Karen J. Mullinger1, Richard W. Bowtell1

1SPMMRC, School of Physics and Astronomy, University of Nottingham, Nottingham, Nottinghamshire, United Kingdom

EEG data recorded during simultaneous fMRI are compromised by large gradient artefact (GA) voltages. The GA is usually corrected using average artefact correction, but any change in the GA during data acquisition significantly reduces the efficacy of correction. Here we characterise the GA contribution from the cabling between the EEG cap and amplifier for two cable configurations: a ribbon cable and a cable bundle. We demonstrate that the GA amplitude and its sensitivity to cable movement can be reduced by minimising cabling wire loop areas. Use of a cable bundle consisting of twisted wires is recommended for future EEG/fMRI studies.