Hi Mevel,
> Actually, our goal was not to perform a VBM analysis but to correct
> volumetric values extracted from ROIs for total intracranial volume. Anyway,
> it should be the same thing. We will try different thresholds
At risk of complicating things with a third script (!) the one below
will let you specify an absolute threshold and/or explicit mask, which
might help in your investigation:
http://www.cs.ucl.ac.uk/staff/gridgway/vbm/get_totals.m
(It would be fairly easy to modify the script to keep track of several
totals for different thresholds at once, to avoid loading each image
more than once...)
Best,
Ged.
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