afni.nimh.nih.gov

You can compute the average TSNR with this command:

3dmaskave -quiet -mask full_mask.$subj+tlrc TSNR.$subj+tlrc

Consider the QC reports generated by gen_ss_review_scripts.py that will include this information and lots more. These reports can be automatically generated with the afni_proc.py option "-html_review_style pythonic"