1) You can use mri_surf2surf to map data from an individual subject to
our normalized (fsaverage) coordinate system.
2. Not sure what this means. In fsaverage space there really is no
volumetric coordinate for a vertex, just it's location on the sphere. For
individual subjects you can compute the coords of a vertex (see our wiki
pages under coordinate systems), but not in the average space.
cheers
Bruce
On Sun, 14 Apr 2013, Bharti
Rana wrote:
Dear prof. Bruce
Thanks once again. As you clarify that each brain has different number of
vertices. But still I want to ask the followings:
1) How to map these on some standard template say Freesurfer template and
then retrieve cortical thickness for each vertices?
2) How to identify the location of each retrieved cortical vertices?
Kindly guide me for the same. I'll be highly thankful to you.
On Wed, Nov 21, 2012 at 8:19 PM, Bruce Fischl <fis...@nmr.mgh.harvard.edu>
wrote:
yes, each brain has a different number, sufficient to get about
1mm isotropic resolution. You can use our spherical averaging to
map them to a common coordinate system with the same # of
vertices if you want (I think mri_surf2surf will do this)
cheers
Bruce
On Wed, 21 Nov 2012, Bharti Rana wrote:
I am Bharti, a M.Tech./Ph.D student at School of
Computer & Systems
Sciences, Jawaharlal Nehru University, New Delhi,
India. My area of interest
is pattern recognition and image processing. In one
of my research work, i
used freely available freesurfer software to find
cortical thickness using
recon-all -all command.
But, while retrieving cortcal thickness maps using
read_curv() function, i
am getting different number of vertices for
different brains. Are different
number of cortical vertices possible for two
different brains? I have gone
through FAQ provided by Freesurfer but i did not
find any related answer.
Kindly clarify.
Thanks in advance.
--
Best Regards
Bharti
M.Tech./Ph.D.
School of Computer & Systems Sciences
Jawaharlal Nehru University
NEW DELHI, INDIA
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--
Best Regards
Bharti
M.Tech./Ph.D.
SC&SS
JNU, NEW DELHI
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