Re: [Freesurfer] Correct for sulcuses & ventricles size

2020-12-13 Thread Greve, Douglas N.,Ph.D.
On 7/11/2018 11:37 AM, John Anderson wrote: External Email - Use Caution Dear Freesurfer experts, I have two groups of subjects (healthy and patients). The patients have different degrees of atrophy. Looking into the individual scans, the subjects are largely different in the space be

Re: [Freesurfer] Correct for sulcuses & ventricles size

2018-07-11 Thread Bruce Fischl
I suppose you could look for voxels that outside of the cortex and adjacent to it On Wed, 11 Jul 2018, John Anderson wrote: External Email - Use Caution Dear Dr Bruce, Thank you for the response. Indeed, I was completely wrong, these represent a pathology and should not corr

Re: [Freesurfer] Correct for sulcuses & ventricles size

2018-07-11 Thread John Anderson
External Email - Use Caution Dear Dr Bruce, Thank you for the response. Indeed, I was completely wrong, these represent a pathology and should not correct for! Kindly, I have one additional question not relevant to the subject of this email. Is there any way in Freesurfer to cr

Re: [Freesurfer] Correct for sulcuses & ventricles size

2018-07-11 Thread Bruce Fischl
Hi John why do you want to correct for them? They likely represent a pathological process, so correcting for them may remove whatever effects you are looking for, no? The space between the sulci and the ventricle volume won't directly affect surface-based analysis, but of course the sulcal wid

[Freesurfer] Correct for sulcuses & ventricles size

2018-07-11 Thread John Anderson
External Email - Use Caution Dear Freesurfer experts, I have two groups of subjects (healthy and patients). The patients have different degrees of atrophy. Looking into the individual scans, the subjects are largely different in the space between the sulcuses and the size of ven