Dear freesurfer experts,

I have a question about the use of a registration matrix in the context of mri_label2label. I have a series of labels that were created through mri_volcluster (each significant cluster from a .sig map was saved as a uniqe label as a product of that command), and I wish to map each of these from average space (fsaverage) into native space. However, when I use mri_label2label for this purpose some of the clusters map into plausible subject-space, however others are obviously incorrect.

Here is the command line that I have used:

mri_label2label --srcsubject fsaverage --srclabel $SUBJECTS_DIR/group_analysis/${CONTRAST}/${LABEL} --trgsubject ${SUBJECT} --trglabel $SUBJECTS_DIR/${SUBJECT}/label/${CONTRAST}_${LABEL} --regmethod volume --reg $SUBJECTS_DIR/${SUBJECT}/bold/register.dat

I have also tried this command without --reg, but no luck. It seems like I would need a registration matrix that maps each subject to fsaverage, no?

Thanks very much in advance,