Hi Dan
sorry, I'm not really sure what you are asking. Doug implemented a
work-around for nifti in which it breaks up the number of vertices into
multiple dimensions (to get around the 16-bit dimensions in nifti, which
was a crazy design decision). freeview detects this and displays them
appropriately
cheers
Bruce
On Wed, 30 Jan 2019, Daniel
Leopold wrote:
External Email - Use Caution
Hi Bruce,
Chris Rorden informed me that Surfice previously assumed that MGZ/MGH files
were voxelwise images used to
surface-paint a mesh. Anderson's palm, however, uses the format as a one-to-one
correspondence with the vertices
(i.e., data-per-vertex). Chris' newest/upcoming version of Surfice
automatically detects this data-per-vertex
format and can load the files appropriately.
The main feature that freeview lacks is the ability to display multiple
overlays/sets of palm results at once. My
initial approach was to convert the .mgz palm outputs into .nii so that I could
use fslmaths to combine results,
but (apparently) NIFTI handles a maximum of 65,535 voxels in any one dimension,
which is why Chris thought Anderson
used MGH, which allows billions of vertices (32-bit).
So, Surfice can now load the palm .mgz outputs onto ?h.inflated, .pial, and
.curv surfaces, but I'm now wondering
if mgh/mgz overlays be be loaded on top of other background meshes (such as
BrainMesh_ICBM152 or mni2fs meshes that
are provided with Surfice). I've emailed Darren Price because I'm essentially
looking for the inverse transform of
his mni2fs package (i.e., fs2mni), but I was wondering if you or Doug have
encountered this question or similar
requests to convert freesurfer to mni surfaces/meshes before? I'm familiar with
the Freesurfer Coordinate Systems
info, but I don't know how I might generalize the RAS to MNI152 point
conversion to an entire surface.
Thank you again for your suggestions and help!
Dan
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