Gradient Artefact Correction and Evaluation of the EEG Recorded Simultaneously with fMRI Data Using Optimised Moving-Average

Figure 9

(a) Scalp potential excerpt picked up from the EEG electrode FP1 of the GE data; (b) power spectrum of the signal (a), showing up the harmonic artefact activity associated with the gradient artefact at multiples of 1/TR-slice (TR-slice = 357 ± 1 samples), approximately equal to 14 Hz for the GE data.

(a)

(b)