On the Quality, Statistical Efficiency, and Safety of Simultaneously Recorded Multiband fMRI/EEG

Brain Topography
Joseph C C ChenSuresh D Muthukumaraswamy

Abstract

The recent development of multiband functional magnetic resonance imaging (MB-fMRI) allows for the reduction of sampling period by simultaneously exciting multiple slices-the number of which is referred to as the multiband factor. Simultaneously recorded electroencephalography (EEG)/MB-fMRI has yet to be validated for data quality against conventional single band (SB)-fMRI. Pilot scans were conducted on phantoms twice and on a healthy volunteer to ensure no heating effects. In the main study, two thermometer probes were attached to 16 healthy individuals (ages 20-39, 9 females) whilst they completed two sets of 16-min resting-state and two sets of 9-min n-back task scans-each set consisting of one MB4 and one SB pulse sequence. No heating effects were reported and thermometer data showed mean increases of < 1.0 °C. Minimal differences between the two scan types were found in EEG channel variance and spectra. Expected decreases in MB4-fMRI tSNR were observed. In n-back task scans, little to no differences were detected in both EEG source analyses and fMRI local analyses for mixed effects. Resting-state posterior cingulate cortex seed-based analyses of the default mode network along with EEG-informed fMRI analysis of the occipita...Continue Reading

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Citations

Mar 22, 2021·NeuroImage·Benjamin B RiskDeqiang Qiu

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Methods Mentioned

BETA
feature extraction

Software Mentioned

FMRIB Utility for Geometrically Unwarping EPIs ( FUGUE )
FLAME1
FLAME
MB4
FMRIB
EEGLAB
FEAT
linear Image Registration Tool ( FNIRT )
SB
Local Analysis for Mixed Effects ( FLAME )

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