Chris and VBMers,
> Thanks so much for replying--I was using an absolute threshold of .1,
I'll
> try up'ing that. Regarding the GM mask, is there a generic mask
template
> that everyone uses, or do you generate a study-specific GM mask (the
way
> you generate study-specific templates). Or can i use a study-specific
> template as my GM mask?
If you used a study-specific template for the optimized VBM protocol,
then your GM images are in your study-specific space rather than the MNI
space. So I think it's sensible to use your study-specific template. You
can create a binary GM mask image by thresholding your GM mask with, say
>10% GM.
Good luck!
-Satoru
|