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

Figure 7

(a) Scalp potential excerpt picked up from the EEG electrode Fz of the Philips 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 = 250 samples), equal to 20 Hz for the Philips data.

(a)

(b)