External Email - Use Caution
Thanks for the reply Doug.
I'm looking for the same number of verts as the *subject* - maybe it's
as simple as I should be registering the subjects *to* the FS average
subject? But the problem is that I want the points in subject space,
not average space.
So if I have five subjects - I would like the same number of points for
each one, which I thought I would get by registering the average to each
of them...
On 11/05/2020 18:56, Douglas N. Greve wrote:
Ian, it seems like you want two different things. When you run
mri_surf2surf, it gives you an output that has the same number of
vertices as the target which would allow you to do the one-to-one
comparison that you want to do. But at the same time, there seems to
be a problem with having the same number of vertices. I'm still
confused as to what you want to do. If you want to do a one-to-one
comparison, then you've got to change the number of vertices, unless
I'm missing something.
On 5/11/2020 9:38 AM, Ian wrote:
External Email - Use Caution
Thanks Tim.
I'd like a set of points on the surface to compare across subjects,
where there are the same number of points for each subject and
they're roughly in the same "physiological position" on each
subject. So again, if on my atlas I have a point which is at the top
of the ctx-rh-fusiform sulcus, I'd like that point to be registered
to the top of the ctx-rh-fusiform sulcus in my subjects.
On 11/05/2020 13:49, Tim Schäfer wrote:
External Email - Use Caution
The registration registers the meshes, but it does not alter the number of
vertices in them. There is no 1-to-1 correspondence between the vertices of the
2 meshes.
May I ask why you need this? What do you want to achieve?
Tim
On May 11, 2020 at 2:11 PM Ian<ian@mode7.games> wrote:
External Email - Use Caution
I'm just going to try this again, but this time with a different command:
mris_apply_reg --src-xyz
/usr/local/freesurfer/subjects/fsaverage/surf/lh.white --trg
/home/ian/lh_reg.white --streg
/usr/local/freesurfer/subjects/fsaverage/surf/lh.sphere.reg
/obd-fs/proc/my_subject/freesurfer/surf/lh.sphere.reg"
This gives me the same issue - fsaverage/surf/lh.white has 300k+ points
in it, and the output of this command has fewer than half that.
I do not understand what kind of registration would reduce the number of
points. What is the relationship between the first point in --src_xyz
file and the first point in the output registered file? If I halved the
number of points in the input, would I expect the output to be half the
size? Or less?
I'm sure there's a simple explanation that I don't have my head around
just yet - thank you for your patience.
Ian
On 07/05/2020 22:45, Douglas N. Greve wrote:
Isn't that what you got from the mri_surf2surf command?
On 5/7/2020 3:08 PM, Ian Hardingham wrote:
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
--
Dr. Tim Schäfer
Postdoc Computational Neuroimaging
Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy
University Hospital Frankfurt, Goethe University Frankfurt am Main, Germany
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
--
*Ian Hardingham*
Chief Technology Officer
signature_873986710
ian.harding...@oxfordbraindiagnostics.com
<mailto:terry.poll...@oxfordbraindiagnostics.com>
+44 (0)7789 770555
Oxford Centre for Innovation | New Road | Oxford | OX1 1BY
Oxford Brain Diagnostics Ltd is a company registered in England and
Wales | Company No. 11703979 | VAT No. 321 3026 62
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
