Dear FSL users,
I am currently looking into using MELODIC to identify and filter out
excessive motion that cannot be adequately compensated by McFLIRT. The FSL
website explains how to use Melodic, but I am having a hard time finding out
how the filtering works. My questions:
Does it average, smooth, or interpolate out the respective voxels with
respect to the component time courses(as generated by melodic), or simply
reduce/increase the voxel intensity by the thresholded amount?
In theory, doesn't including the motion estimates as separate ev's already
attempt to 'devalue' these voxels associated with motion?
Since the IC's usually have a periodic aspect to their model, how much
non-motion voxel changes are being filtered out? I understand 'rimming'
effects are effectively removed this way, but I am looking at some
interleaving effects from motion that doesn't look as safe to filter out.
Help on this topic greatly appreciated, thanks in advance,
Shawn
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