That is the right command

On 3/20/2025 4:27 AM, Dr. Cornelius Kronlage wrote:

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Dear freesurfer team,

in the wiki (https://secure-web.cisco.com/1WbYcGgb3srAnGYyZARo_Jad7UgANe_5pADqErCcDyQA2UA...) the following is used to map surface data from an individual subject's right hemisphere to fsaverage_sym's left hemisphere:

mris_apply_reg --src rh.map.mgh --trg rh.map.lh.fsaverage_sym.mgh --streg $SUBJECTS_DIR/subject/xhemi/surf/lh.fsaverage_sym.sphere.reg $FREESURFER_HOME/subjects/fsaverage_sym/surf/lh.sphere.reg

How would you recommend to perform the inverse mapping from fsaverage_sym's left hemisphere to an individual subject's right hemisphere? I would suspect the --streg arguments need to be swapped like so:

mris_apply_reg --src rh.map.lh.fsaverage_sym.mgh --trg rh.map.mgh --streg $FREESURFER_HOME/subjects/fsaverage_sym/surf/lh.sphere.reg $SUBJECTS_DIR/subject/xhemi/surf/lh.fsaverage_sym.sphere.reg

Is that correct? Or would you need to first map to fsaverage_sym's right hemisphere?

Thank you! Cornelius

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