I'm using the bad volumes function in art repair to correct for subject motion. I had originally defined a specific motion threshold to be used on all subjects (1mm/TR) and to repair all volumes above that threshold. However, with some subjects setting to that threshold would mean correcting for more than 10% of the volumes. I'm planning to increase the threshold for these subjects up to the point where 10% or less of volumes are corrected. I would not set the threshold higher than 2mm/TR. I'm wondering if this approach would be reasonable or if there is a better way to correct for motion.
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