Re: [Freesurfer] mean thickness covariate, mean area covariate, & mri_anatomical_stats for multiple subjects

2013-03-09 Thread Anderson M. Winkler
Hi Laura, I think yes, sounds right. Maybe run both ways and see if the results agree or differ. All the best, Anderson 2013/3/9 Laura M. Tully > Hi Anderson, > > Thanks, that reference is particularly helpful. > > Re: the usage of the white versus pial area question - I believe that the > defa

Re: [Freesurfer] mean thickness covariate, mean area covariate, & mri_anatomical_stats for multiple subjects

2013-03-09 Thread Laura M. Tully
Hi Anderson, Thanks, that reference is particularly helpful. Re: the usage of the white versus pial area question - I believe that the default area calculation in freesurfer is the white surface area, so unless one specifies the pial in calculations, the standard surface area output for surface a

Re: [Freesurfer] nu_correct: Command not found error

2013-03-09 Thread Nick Schmansky
Sinead, Is 'nu_correct' in your freesurfer/mni/bin directory? Are you being careful to run the setup script for just freeview 5.2 and not other packages or versions which might mess-up the perl paths? Nick On Fri, 2013-03-08 at 09:50 +, Sinead Kelly wrote: > Dear all, > > > I am currentl

Re: [Freesurfer] Segfault on first test

2013-03-09 Thread Nick Schmansky
Marcos, Does mri_convert work? What version of tcsh was installed? Maybe you can try the freesurfer centos4_x86_64 distribution? We havent tested on Fedora 18 so we havent seen this before. Nick On Sat, 2013-03-09 at 16:11 -0300, Marcos Martins da Silva wrote: > I did and got the following t

Re: [Freesurfer] mean thickness covariate, mean area covariate, & mri_anatomical_stats for multiple subjects

2013-03-09 Thread Anderson M. Winkler
Hi Laura, >1. Is there a paper that I could cite that recommends using mean >cortical thickness rather than ICV? > > If it helps, we used cortical thickness and area as covariate for the respective analysis of regional thickness and area. Brain volume, which is more closely related to ICV

[Freesurfer] Segfault on first test

2013-03-09 Thread Marcos Martins da Silva
I did and got the following to test freesurfer installation according to freesurfer website directions: [marcos@alien ~]$ tkmedit bert orig.mgz === ERROR: A segfault has occurred. This is not your fault, : but is most likely an unrecoverable error and has : mad

[Freesurfer] mean thickness covariate, mean area covariate, & mri_anatomical_stats for multiple subjects

2013-03-09 Thread Laura M. Tully
Hello freesurfers, It appears that prior discussions on the listserv have recommended using mean cortical thickness (rather than ICV) as a covariate for thickness analyses (predominantly recommended by Michael Harms). I have three questions about this: 1. Is there a paper that I could cite th