[Freesurfer] Quality control of already processed measures available in cohort databases

External Email - Use Caution Hello, Can you please clarify the following regarding the quality control of phenotypes? How do we perform quality control for cerebral white matter volume derived using Freesurfer? Do we use the subcortical QC rating for this the same way as for

Re: [Freesurfer] (no subject)

External Email - Use Caution Hello, Can you please clarify the following: Do we use subcortical QC rating for all subcortical measures such as accumbens as well measures such as total white matter volume. We do not use it for estimated total intracranial volume as this is

[Freesurfer] Thickness vs surface area

External Email - Use Caution Hello, I am performing analyses looking at brain measures for a neurodegenerative disorder. I wanted to ask whether the accuracy for surface area is as high as is for thickness? I would appreciate your advice or any references. Thanks

Re: [Freesurfer] Mean thickness estimation {Disarmed}

t; Cheers > > Bruce > > > > *From:* freesurfer-boun...@nmr.mgh.harvard.edu < > freesurfer-boun...@nmr.mgh.harvard.edu> *On Behalf Of *Stephanie K > *Sent:* Thursday, November 19, 2020 4:19 PM > *To:* Freesurfer support list > *Subject:* Re: [Freesurfer] Mean thicknes

Re: [Freesurfer] Mean thickness estimation {Disarmed}

, 2020 at 3:55 PM Fischl, Bruce wrote: > Hi Stephanie > > > > I think that is always a good idea, unless for some reason it isn’t > possible > > > > Cheers > > Bruce > > > > *From:* freesurfer-boun...@nmr.mgh.harvard.edu < > freesurfer-boun...@n

Re: [Freesurfer] Mean thickness estimation

done? Many thanks, Stephanie On Wed, Nov 18, 2020 at 5:24 PM Stephanie K wrote: > Hi, > I want to estimate the mean cortical thickness. For this I have summed the > thickness across all 34 regions mapped to the Desikan-Killiany atlas. > However, I also have the average mean thick

[Freesurfer] Mean thickness estimation

External Email - Use Caution Hi, I want to estimate the mean cortical thickness. For this I have summed the thickness across all 34 regions mapped to the Desikan-Killiany atlas. However, I also have the average mean thickness of left and right hemispheres (direct output variables

Re: [Freesurfer] Meta-analysing brain measure statistics across multiple cohorts using different versions of Freesurfer

External Email - Use Caution Hi, I am planning on meta-analysing the effects of regional and global cortical thickness + surface area, as well as subcortical volumes of 3 cohorts. Two of them have been processed using Freesurfer 5.3 and one one of them has been Freesurfer 6.0. Is

[Freesurfer] Corticalwhitemattervol versus Cerebralwhitemattervol

External Email - Use Caution *Hi all,* *I'm performing an analysis and I want to look at total white matter volume across various cohorts as an outcome. In most of my cohorts, I find the variable CerebralWhiteMatterVol but in one cohort I cannot find this variable, but I am able