Hi all,
Using previous versions of FreeSurfer, we have used the eTIV as a covariate for our volumetric analyses. We have been using the eTIV numbers from 5.1.0 for new studies. What would you recommend using for subjects who have been run with 5.1.0? Can you make the template available publicly, or would it be legitimate to take the eTIV from 5.0 and the aparc stats from 5.1.0?
Thanks, ~Sue
* * ** *** ***** ******** ************* Susan M. M. Ruiz, Ph.D. Boston University School of Medicine Laboratory for Neuropsychology VA Boston Healthcare System smosher@bu.edu * * ** *** ***** ******** *************
On Jul 16, 2012, at 4:17 PM, Bruce Fischl wrote:
can you send us an example? In the ones we've looked at the older versions were more stable. Alternatively, we can send you a new template that Avi Snyder generated that you could try out
cheers Bruce
On Mon, 16 Jul 2012, Ayaz, Muhammad wrote:
Well, I am using version 5.1.0. I have had same issue in fewer subjects when I used the older version as well. Any comments about that?
-----Original Message----- From: Bruce Fischl [mailto:fischl@nmr.mgh.harvard.edu] Sent: Monday, July 16, 2012 3:04 PM To: Ayaz, Muhammad Cc: freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] sum of WM and GM coming out to be bigger than ICV after recon-all
Hi Ayaz
what version are you running? There appears to be an instability in the eTIV calculation in just version 5.1 (not before or in the upcoming 5.2)
cheers Bruce On Mon, 16 Jul 2012, Ayaz, Muhammad wrote:
Dear All,
After running recon-all, I noticed several subjects that sum of WM and GM is bigger than ICV. I have re-run these subjects and the results is the same sum of GM and WM is coming out to be bigger than ICV.
Any suggestions? I need to calculate normalized volumes.
Regards
Ayaz
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