[Freesurfer] mri_vol2surf

Hello developer,      I want to change a structure MRI (*.img) into two surface files (*_R.w and *_L.w). I first use mri_convert to change *.img to *.mgh ; then use mri_vol2surf to change a *.mgh file to two surface files *_L.w and *_R.w. But here I meet a problem: I don’t know how to get the register.dat file.      I search many documents about this problem, But still didn’t find a method for this problem. Expecting freesurfer advancer give me some instructions!         Any help will be appreciated!        Best regards!        karry

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