Hello Freesurfer team, I have been running a longitudinal analysis and have just finished analyzing the data in qdec and running a cluster correction. I would now like to use the significant cluster annot files to extract the thickness rate stats for each subject and put them in a table. I am a little confused how to do this with a longitudinal dataset. It seems I am unable to use annotation2label with fsaverage to change the annot file to label files. What brain is qdec using to display the longitudinal results? Is it fsaverage as usual or a different average brain? From there I am not sure which directories to use to extract rate stats. Are they kept in the base directories or each time point (XX1, XX2, or XX1.long.XX_base)? I would really appreciate a step by step guide of which programs to use and on what files, to be able to extract stats for each subject using significant clusters as ROIs. I hope my question is clear and thank you for your time.

Best, Briana Robustelli

-- Briana Robustelli Post-Baccalaureate IRTA Laboratory of Brain and Cognition, NIMH/NIH/DHHS Building 10, Room 4C103 10 Center Dr MSC 1366 Bethesda, MD 20892 Phone: (301) 435-4491 Briana.Robustelli@nih.gov