For the past few days I have been trying to use the output from the Samseg tool to generate more volume metrics, such as gray matter volume. Unfortunately, I am not getting any output other than what I already get from Samseg. I tried running mri_segstats, but that also gave me the same volumes I already had. I was wondering if there is another tool within freesurfer to calculate these volumes for which I do not need to run the recon-all tool due to time constraints.