I have never done interspecies registration, so my help will be limited there.
But in the interest of mental model refinement, my own doesn't think of getting
a hemisphere on a standard mesh, with evenly spaced nodes, as a precondition to
registration; rather, I think of it as a step in the
The way I understand it, if you already have an atlas sphere, you can (and
probably should) register the native mesh to the spherical atlas directly,
and the result is that (among other things) you get a new surface that
aligns with your native surface, but has topology and node spacing similar
to
it doesn't have to be freesurfer; you can just skip the bits where a
midthickness is made and hack it a little and use straight from caret. Most
if it is just really good registration code.
the freesurfer tutorial and code and data is in summs somewhere, and I
forget where exactly. the data for
