Sorry, I don't have anything that will do that. You could probably do it in matlab, if you know how to program in matlab.

doug

Dave Brohawn wrote:

Hello,

I ran the following analysis to target task-specific voxels at a certain contrast and offset.

func2roi-sess -roidef dACC10_lh -analysis EMerror -anatlabel dACC-lh -maskcontrast ASevfix -maskframe 5 -maskthresh 1 -masktail pos -maskmap sig -sf Subject_files/MTHFRn18-list -d $SUBJECTS_DIR

I would like to create a functional constraint including only the 25% most active voxels (top quartile).

Is there a command that can achieve this?

Thanks,

Dave Brohawn _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer