I have a question about a MC output file. When I run the MC sim (using mri_glmfit-sim) on the surface, it generates a bunch of files including a 'sig.masked.mgh', which is nice for displaying the significance map limited to the clusters that survive the MC correction. However, when I run it on the volume, it doesn't generate this specific file. Does anyone know the reason for that? Is there an alternative way to display the significance map that show only the clusters that survive the MC correction? 

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