Xin,
You do not have to correct the pial surface for that area - these surfaces
do not affect the aseg.mgz. You will often see the surfaces in the
hippocampus/amygdala regions as inaccurate, however your aseg will look
fine.
Allison
On Fri, 13 Jul 2007, Wang, Xin wrote:
This is an example of my problem area (labeled with * in the fig). Do I need to
correct the pial surface? If so, how to do it? Does this problem effect the
values of hippocampus in the aseg.mgz?
Many thanks,
Xin
________________________________
From: Bruce Fischl [mailto:[EMAIL PROTECTED]
Sent: Tue 7/10/2007 10:39 AM
To: Wang, Xin
Cc: freesurfer
Subject: RE: [Freesurfer] add the gray matter
oh, I wouldn't worry about the surfaces in the hippocampus. They aren't
meant to be accurate there. There is too much internal structure there - we
model is separately in the aseg.mgz files.
cheers,
Bruc
On Tue, 10 Jul 2007, Wang, Xin wrote:
Dear, Dr. Fischl
Thank you for your suggestion. My problems are around hippocampus. The
grey/white surface is OK now. but some grey matters are not included in the
pial surface. How to change the Pial surface?
Thank you again,
Xin
________________________________
From: Bruce Fischl [mailto:[EMAIL PROTECTED]
Sent: Mon 7/9/2007 5:53 PM
To: Wang, Xin
Cc: freesurfer
Subject: Re: [Freesurfer] add the gray matter
it depends why it's not getting out far enough. Usually you need to add
control points in the nearby white matter that are <110 on the
brainmask.mgz volume.
On Mon, 9 Jul
2007, Wang, Xin wrote:
Hello, Group
I need to edit the pial surface. I learned to remove points with tkmedit from
the tutorial. But how to add gray matter in the pial surface?
Thank you in advance.
Xin
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