Re: [Freesurfer] surface template N

2014-12-21 Thread Bruce Fischl
the easiest thing to do is check the quality of the parcellations. If they look good then nothing major went wrong with the registration cheers Bruce On Sun, 21 Dec 2014, Jason Tourville wrote: Thanks for looking into the Bruce. Is there a standard protocol for checking the surface registrat

Re: [Freesurfer] surface template N

2014-12-21 Thread Jason Tourville
Thanks for looking into the Bruce. Is there a standard protocol for checking the surface registrations? On Fri, Dec 19, 2014 at 4:21 PM, Bruce Fischl wrote: > > Hi Jason > > as I discovered today poking through the code, make_average_subject calls > mris_make_template and also creates a bunch of

Re: [Freesurfer] surface template N

2014-12-19 Thread Bruce Fischl
Hi Jason as I discovered today poking through the code, make_average_subject calls mris_make_template and also creates a bunch of other useful things (average volumes and asegs and such), so I would use it cheers Bruce On Fri, 19 Dec 2014, Jason Tourville wrote: > Thanks for the feedback. We

Re: [Freesurfer] surface template N

2014-12-19 Thread Jason Tourville
Thanks for the feedback. We may have sufficient numbers for binning. Regarding template creation, the wiki lists two methods, one that involve "make_average_subject" and another that involves "mris_make_template". For our purpose, which is to generate a pediatric surface template for use on a larg

Re: [Freesurfer] surface template N

2014-12-18 Thread Bruce Fischl
Hi Jason I would say at least 15, but you can also just check to see when things start to asymptote. I think Christophe found there were diminishing returns after 12 or so, but things have changed somewhat since then, and of course it will depend on the variance on your population. cheers Bruc

Re: [Freesurfer] surface template N

2014-12-18 Thread Anthony Dick
Hi Jason, I saw this last week. I *think* the original template was on 40 brains, so 40 seems like a good number. In my opinion the bigger issue is the 8 year age range. A 3-year-old's head is much smaller than an 11-year-old's. I'm not sure I would mix them, and if there are enough subjects