Hi all:

      I am confused with coordinate systems in FS. I have several questions bellow.

     1. when we run recon-all -s subjid  -all, Is the individual native space transformed to talairach  coordinate system?. when run recon-all -s subjid -qcache, does the talairach system go into MNI system (fsaverage space)?

     2. what is the tranformation matrix within the file of <subjid>/mri/transforms/talairach.xfm?, what is it used for?

     3. Does the coordinates within .label files under <subjid>/label/  belong to the  MNI coordinate system?

    4.  In TkSurfer Tool,  does the coordinate of  "Vertex RAS" belong to MNI coordinate?

Hope someone gives me suggestions.

 

best