Hi all,

 

I'm not sure where the best place to make this request is. so I thought I'll
put this here.

 

I often use freesurfer generated surfaces and images in other software
packages (Slicer, Matlab etc) for various things. The MGZ files include the
origin in the file headers, meaning that software can correctly interpret
the world spaces of these images, allowing correct overlays with other
results computed from the same scans. The problem is that the surface files
treat the 128,128,128 voxel ( of the T1.mgz and other images) as the origin.
But the world coordinates of this origin are, to my knowledge  not in the
surface files.

 

This creates the situation that to correctly interpret these surfaces in
relation to other coordinates systems, basically I either need to ignore the
world coordinates and do some registration, or I need to load both an mgz
file (to get the origin) and surface files to learn correct world
coordinates of the surfaces. Ideally it seems like this information should
be included in the surface files themselves.

 

Hopefully my description of the problem makes some sense.

 

Thanks.

Luke

 

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