Not having BrainSegVolNoVent might just mean that you have an old
version. It was added two years ago, but I'm not sure which build that
would have gotten into. Not sure about the discrepancy with
mri_label_volume.
doug
Dankner, Nathan (NIH/NIMH) [F] wrote:
I've checked out the wiki, and it brings up a couple of other questions. I
don't seem to have the BrainSegVolNoVent measure...maybe this is an issue with
versions? I ran the mri_label_volume command that Bruce provided. There was
roughly a 300,000 mm^3 difference between the output of the mri_label_volume
and BrainSegVol (the mri_label_volume output was the smaller value). Is this
to be expected? It seems to me that they should be the same, unless I am
mistaken?
-----Original Message-----
From: Douglas N Greve [mailto:gr...@nmr.mgh.harvard.edu]
Sent: Mon 4/13/2009 11:42 AM
To: Dankner, Nathan (NIH/NIMH) [F]
Cc: freesurfer@nmr.mgh.harvard.edu
Subject: Re: [Freesurfer] total brain volumes
Did you look at the Brain Volume wiki page? To find it, go to our wiki
and type in "BrainSegVol" in the search box and hit the "Text" button.
doug
Dankner, Nathan (NIH/NIMH) [F] wrote:
I think this may have slipped through the cracks, so I am posting it again. I
apologize if this has been answered already. If the information is available
elsewhere and I happened to miss it, please let me know.
-----Original Message-----
From: Dankner, Nathan (NIH/NIMH) [F]
Sent: Thu 4/9/2009 1:55 PM
To: freesurfer@nmr.mgh.harvard.edu
Subject: [Freesurfer] total brain volumes
I am looking to derive total brain volume measures from the data that I have. Judging by reading previous posts, it seems that BrainSegVol in aseg.stats includes cerebellum and ventricles. Is there any way to eliminate these from the calculation? Is it kosher to subtract the cerebellum/ventricle measures found elsewhere in aseg.stats/wm.parc from BrainSegVol, or are these derived differently from BrainSegVol? Secondly, would merely adding the left-cerebral-cortex to right-cerebral-cortex measures found in aseg.stats give me total brain volume? Thank you in advance,
Nathan
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--
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
Fax: 617-726-7422
In order to help us help you, please follow the steps in:
surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
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