= FreeSurfer Tutorial and Workshop Quiz = '''Discuss the answers to these questions with your partner.''' What is the difference between a volume and a surface? Do I have to use two MPRAGEs to run recon-all? Explain. Can !FreeSurfer help me select a region of interest and measure certain quantities within? How? What is fsaverage made of? What measures will !FreeSurfer give me? How long does it take for recon-all to finish processing one subject? How long would it take you to do this manually? Why do I have to set so many variables before using !FreeSurfer? Where do I find all those fantastic stats files !FreeSurfer created for me? When mailing the !FreeSurfer list about a problem, what information should I include? Why is spherical averaging better than current volume-based methods out there? What is a limitation of this procedure? When you do all that crazy morph stuff, are you changing the data? When I report my findings in a paper, is there any way to report the Talairach coordinates? Do I have to remove every bit of skull, dura, etc. that I see in the brainmask? Why or why not? Oh no! I made all these edits to a subject but now I want to rerun recon-all on the subject again with a new version of !FreeSurfer. Will I lose all my work? Where do all those atlases come from that !FreeSurfer uses? If a ran my subjects with version 4.0, can I run the rest with the newest version? How do I control for head size? Answers can be found on the FsQuizAnswers page. Don't peek until you've tried to answer on your own!