On 6/4/2020 12:38 PM, Barletta, Valeria wrote:

Hello Freesurfers,

I need to perform a GLM in 25 patients versus 19 controls but I need the comparison to be done only on normal appearing cortex (in patients), thus excluding cortical lesions.

Is it possible to concatenate binary masks projected to surface? What command shall I use?

You could
mri_concat mask1.mgz mask2.mgz ... --mean --o mask.mean.mgz
mri_binarize --i mask.mean.mgz --min .0000001 --o mask.concat.mgz

If I use the option --mask for mri_glmfit, will I obtain the same type of output with the only difference that clusters are looked for in the concatenated masks?

Yes.

Thank you,

Valeria Barletta, MD

Massachusetts General Hospital
149 13th Street, Charlestown MA 02129
(617)-724-8823
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