Hi:
I am having troubles in preparing a picture showing MR image segmentation in the coronal, axial and sagittal planes.
Any light on that?
Thanks, --francesca
Francesca Bagnato, MD NIB-NINDS-NIH 10 Center Drive Building 10, Room 5B16 Bethesda, MD, 20892 USA ph #: 001-301-402.6391 fax #: 001-301-402.0373
-----Original Message----- From: Bruce Fischl [mailto:fischl@nmr.mgh.harvard.edu] Sent: Tuesday, May 31, 2005 1:50 PM To: Wan Park Cc: free surfer Subject: [Freesurfer] Re: Gray Volume question
Hi Wan,
they haven't been normalized. Typically you would normalize by the total intracranial volume, which can be a bit tricky to get from only a T1. If you normalize by total brain volume, that should be a bit more conservative, as it would normalize out total atrophy.
cheers, Bruce
On Tue, 31 May 2005, Wan Park wrote:
Hi, I have a question. I am getting the gray volume for a standard area (G_subcallosal) in different brains (male and female) with different conditions.
If I want to compare these volumes, should I normalize them with the total
brain (or hemisphere) volume or can I use these results directly? I understand that the FS fills the volume from a particular brain into a standard brain. So, are the volumes already normalized? Thanks,
Wan
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