hi, all
does freesurfer v5 have multiple fsaverage subjects with varying number of vertices?
see the following mails; where does fsaverage6 locate?
-------------------------------------------------------------------- Nick Schmansky nicks at nmr.mgh.harvard.edu
Fri Sep 10 15:23:09 EDT 2010
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1. in freesurfer v5, there are now multiple fsaverage subjects with varying number of vertices. fsaverage6 has about 40,000 vertices per hemi, so you can just include the flag:
--target fsaverage6
after the -qcache flag, and it will use that as the target instead of fsaverage (producing files like 'rh.thickness.fsaverage6.mgh', which will have 40K thickness samples).
-------------------------------------------------------------------- On Fri, 2010-09-10 at 15:19 +0800, Dai Dai wrote:
Hi, all
I am a new user of freesurfer and now I have two questions.
- For my work, the number of vertex in surface data is too much to
process. How can I downsample the surface mesh as well as the curvation file (e.g. thickness)? The vertex number of fsaverage template is ~160,000, normally more than that of every subject. Can I construct an average surface of less vertexes or downsample the fsaverage surface to that of ~20000 vertexes and then transform all the subjects using these templates with less vertexes (using recon-all -qcache)?
2011-05-26
Dai Dai