Hi FS experts,

I reconstructed several 0.75mm structural images using recon-all v6 with highres flag successfully and everything looks fine. Now, I want to transform structural images (norm.mgz, 0.75mm3, 320^3) to the common space (MNI305, 1mm3, 255^3 for freesurfer) using mri_vol2vol with mri/transforms/talairach.m3z, however the result looks wired with distorted shape and wrong centroid. I also attempt to run mri_convert with "-at" flag. The output looks fine and the resolution keeps the same with input, i.e. 0.75mm3.

So I suppose the problem of using mri_vol2vol is the wrong "targ" reference, which should be a high resolution MNI305, But I can't find it.

Could you tell me if my understanding is right or not? If it's right, where can I find the high resolution MNI305 template?

There are the commands I used:

mri_vol2vol --mov norm.mgz --targ $FREESURFER_HOME/average/mni305.cor.mgz --m3z transforms/talairach.m3z --noDefM3zPath --o norm_mni305.nii.gz  --interp trilin

mri_convert -at transforms/talairach.m3z norm.mgz norm_mni305.nii.gz -oc 0 0 0

Best,