Hi Huiting, you don't need to give it a register.dat. That only gives you access to label locations of your clusters. If this is something you want, you can use $FREESURFER_HOME/average/mni152.register.dat. doug

Huiting Liu wrote:

Hello all,

I'm trying to run mri_volcluster on our third-level functional data and one of the required flagged arguments is the register.dat file. Our data preprocessing/registration was done in FSL, not Freesurfer, so we don't have this particular file. Is there anything we can do to get around this or do we need to run tkregister first in order to use mri_volcluster?

Thanks for your time. -Huiting _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer