Hello,
           It is not clear to me exactly what you want to do. If you have run a group FEAT and wish to limit your results to a specific ROI, then you will want to use Featquery:

http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/FEAT/UserGuide#Featquery_-_FEAT_Results_Interrogation

An example of featquery usage is given in the FSL course:

http://fsl.fmrib.ox.ac.uk/fslcourse/lectures/practicals/feat1/#featquery

Kind Regards
Matthew

Dear FSL,

I would like to calculate the change in normalized for different subject brain activity using Atlas as mask

how to go with this

should i want to create Cluster and fslmaths to create mask
or
Atlasquery -a "atlas" -m mskname
or

fslmeants or fslstats






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Regards,
Aiyappan
PhD Scholar
TUM, Munich, Germany