Hi all,<br><br>I had a question when convert a surface to volume space.<br><br>First, I converted a volume nifti data to fsaverage:<br><br>mris_preproc --target fsaverage --hemi lh --iv data.nii bb_register.dat --out data.lh.mgh<br>

<br>Then, I want to convert the data.lh.mgh to volume space, I tried mri_surf2vol, however, it needs register.dat. As I understood, the data.lh.mgh was already registered to fsaverage surface, so how can I get the required register.dat file? Thank you for your attention.<br>

<br>Best,<br>Xiangyu<br>