Re: [Freesurfer] Why weighted least squares?

2015-04-19 Thread ye tian
Dear Doug, I don't understand what you mean by " the variance of the fMRI time series". I fed Freesurfer only structural MRI data. Does that mean that Freesurfer automatically assumes the data to be longitudinal? I really hope not. Sincerely, Ye On Tue, Apr 14, 2015 at 8:11 PM, Douglas Greve w

Re: [Freesurfer] adjust pial surface outward for abnormally thick cortex

2015-04-19 Thread Bruce Fischl
I think the topology is constrained to be correct - are you sure there is an error? And I guess I would try smoothing in freeview Cheers Bruce > On Apr 19, 2015, at 8:29 PM, Jonathan DuBois > wrote: > > Hi Bruce, > > Thanks. It took some trial and error but I was able to fix the surface wi

Re: [Freesurfer] adjust pial surface outward for abnormally thick cortex

2015-04-19 Thread Jonathan DuBois
Hi Bruce, Thanks. It took some trial and error but I was able to fix the surface with the reposition surface tool. However, it results in a fairly jagged surface with some topology error. To correct this, should I use the smooth surface tool in freeview or reprocess the surfaces with recon-all? Th

Re: [Freesurfer] Extreme mean values for significant clusters (using GLM)

2015-04-19 Thread Bronwyn Overs
Hi Doug, Sorry I am not sure that I understand. Does the --y file contain all of the values for each individuals subject, mapped to the fsaverage image? Kind regards, Bronwyn Overs Research Assistant Neuroscience Research Australia Neuroscience Research Australia Margarete Ainsworth Buildin

Re: [Freesurfer] Extreme mean values for significant clusters (using GLM)

2015-04-19 Thread Douglas Greve
No, it gets the information from the stack of data used as the --y input to mri_glmfit. doug On 4/19/15 7:05 PM, Bronwyn Overs wrote: Hi all, I am still a little confused as to how the individual values are calculated for the significant clusters in the GLM model. Is the cluster mapped backe

Re: [Freesurfer] Extreme mean values for significant clusters (using GLM)

2015-04-19 Thread Bronwyn Overs
Hi all, I am still a little confused as to how the individual values are calculated for the significant clusters in the GLM model. Is the cluster mapped backed on the individual brain and the mean thickness for that region is printed out for each individual? Kind regards, Bronwyn Overs Rese