Hi SPMers,
I'm attempting to use Ged Ridgway's get_totals script to extract grey matter volume from some ROIs but I'm unsure whether it is appropriate to do this with smoothed images or whether I need to have unsmoothed images.
I've used Dartel to get my modulated, normalised, smoothed images but, as I understand it, my images will suffer from "aliasing" artifacts if I set the smoothing to 0, 0, 0. Presumably, then, I need to use smoothed data if I want to use Dartel? But is it appropriate to extract grey matter volume from smoothed images? Perhaps if I were to smooth my images by a very small kernel (e.g. 1.5, 1.5, 1.5)?
Many thanks,
Antoinette
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