Dear Freesurfer experts,

I would like to transform the task-based surface data to volume. May I know if it is applicable? I tried "mri_surf2vol --o test.nii.gz --subject sub002 --so fs/sub002/surf/lh.white fMRI/sub002/task/001/fmcpr.odd.sm5.fsaverage.lh.nii.gz", but my system frozen. Any suggestions would be appreciated.

Another problem is that in some individuals I found the RAS information of preprocessed surface data of different sessions are not identical, that means the "voxel to ras transform" and "ras to voxel transform" in fmcpr.odd.sm5.fsaverage.lh.nii.gz are different between seesion1 (folder 001) and session2 (folder 002). May I know how this happened and will it influence the final result? Should I keep them the same?

Thanks,

LIzhi