Hi freesurfer gurus, I just noticed that version 4.1.0 is out. We have a relatively large amount of data already processed through various freesurfer versions such as 4.0.0 4.0.2 4.0.5. Is it valid to compare volumetric measurements from the subcortical segmentation file aseg.mgz across these versions? Must we do reruns? Cheers Jared