Hi,

I have a question about spherical registration, and I couldn't find a
relevant answer in the mailing list.

I have two subjects S1 and S2 with corresponding functionals. I want to
show the functionals of each subject on the surfaces of the third subject
S3. I have .sphere files for S1, S2, and S3, but I don't have .sphere.reg
files yet because these are monkey subjects and I did not want to register
them to the buckner40.tif template. Since my goal is not group averaging,
and it is just to map functionals to the same-subject anatomicals and then
to the target-subject anatomicals, I was thinking of one of the following
solutions:

1) Convert sphere of S3 to a template .tif file, then use mris_register to
register spheres of S1, S2, and S3 to that template and generate
sphere.reg for all the subjects. Not sure if mris_make_template works for
one subject though.

2) Make a template from "S1 and S2" through the procedure described at
https://surfer.nmr.mgh.harvard.edu/fswiki/SurfaceRegAndTemplates#Creatingaregistrationtemplatefromscratch.28GW.29.
Then register S1, S2, and S3 to that template and generate sphere.reg for
all the subjects.

Which approach is recommended?

BTW, I do not know of a monkey template that is based on the surfaces from
a large group of monkeys.

Thanks for any advice,
Reza
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