Hello all,
I was wondering if there is a quick way to make edits to multiple slices of the aseg.mgz (or the brainmask.mgz) volume.

Specifically, I am working on my first subject, and it seems that on almost every slice, pieces of the dura/skull/arachnoid/what-have-you get segmented as cortex (less often, pieces of dura are included within the boundary of the pial surface). I've worked on some slices by manually removing/de-segmenting the pixels that need to go, but this is proving to be extraordinarily time-consuming (some of the slices I've worked on can take 10 minutes easily; perhaps I am obsessing too much, but am trying to get it as close to perfect as it should look). For over 100 slices, even 5 minutes/slice of editing will take several hours. I tried changing the mri_watershed parameter on another subject, but that didn't seem to fix anything.

Any tips to save me hours will be greatly appreciated.

-Chris
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