'mris_calc' is designed to perform be a simple "calculator" that performs a set of operations between two operands of the same type. These operands are either 3D structures (like volumes) or 1D arrays (like curvature files). You can add/subtract/multiply/divide/etc two operands.

How would you want to use 'mris_calc' on groups? When you say "mris_calc doesn't have a .log as output" do you mean you'd like to use mris_calc on two "log" files? Can you explain more what you are trying to do?

Best

-=R

On 18/09/16 10:55, Nick Corriveau Lecavalier wrote:

Hi Freesurfer team,

I have a 2 Group (MCI, CTL) x 2 (Time1, Time2) protocol. As suggested in an earlier discussion, I measured the rate atrophy for each group between my two time points. Then I applied the clusterwise correction for multiple comparison, which give a lot of information about each group (for example, number of clusters, # of voxels, regions where there's a significant difference).

Then I used mris_calc to compute the difference between my groups.

My question is: Is there a way to obtain the same informations on the group difference? Since mris_calc doesn't have a .log as output, I can't compute mris_glmfit-sim on it and I cannot get any infos on the cluster summary.

Regards,

Nick Corriveau-Lecavalier, B.Sc. (Hons.) Étudiant au Ph.D. recherche/intervention, option neuropsychologie clinique Coordonateur à la recherche, Association étudiante des cycles supérieurs en psychologie de l'Université de Montréal (AÉCSPUM) Université de Montréal Centre de recherche de l'Institut universitaire de gériatrie de Montréal, bureau M7819

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