you can run mris_info on one of the surface. It will tell you (among other things):
num vertices: 163842
On 07/16/2013 11:23 AM, Boratyn, Daria A. wrote:
I must have misunderstood the previous emails then. I though you suggested smoothing the anatomical data prior to registration to avoid the noisy numbers. Glad that is now cleared up, thank you.
Is there a way to find out how many vertices are on the fsaverage_sym surface?
Thank you again, Daria
From: Douglas N Greve [greve@nmr.mgh.harvard.edu] Sent: Tuesday, July 16, 2013 11:20 AM To: Boratyn, Daria A. Cc: Freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] Xhemi question
Hi Daria, I'm not sure what you are trying to do. What do you mean by "improve" your xhemi registration? You should not smooth before registration. doug
On 07/16/2013 10:20 AM, Boratyn, Daria A. wrote:
Couple of quick things in regards to smoothing prior to calculating the LI. I'm just trying to use the fsaverage_sym atlas and improve my xhemi registration, not conduct a thickness asymmetry analysis. Should the smoothing be done before the xhemi registration? If so, do you have a recommendation for the smoothing kernel?
Also, how many vertices are there in fsaverage_sym's surface?
Thank you, Daria
Daria A. Boratyn, Clinical Research Coordinator MS Imaging Lab Massachusetts General Hospital 149 13th Street | Boston, MA 02129 617-726-7531
---------- Forwarded message ---------- From: *Douglas N Greve* <greve@nmr.mgh.harvard.edu mailto:greve@nmr.mgh.harvard.edu> Date: Fri, Jun 7, 2013 at 1:31 PM Subject: Re: [Freesurfer] Xhemi question To: Daria Boratyn <boratyn@nmr.mgh.harvard.edu mailto:boratyn@nmr.mgh.harvard.edu>, "Freesurfer@nmr.mgh.harvard.edu mailto:Freesurfer@nmr.mgh.harvard.edu" <Freesurfer@nmr.mgh.harvard.edu mailto:Freesurfer@nmr.mgh.harvard.edu>
Hi Daria, the only way is to map the individual curvature to the group space (fsaverage_sym) and see if the curvatures seem to align. doug
ps. Please post questions to the FreeSurfer list. Thanks!
On 06/07/2013 11:13 AM, Daria Boratyn wrote:
Hi Doug,
We are experimenting with adding xhemi to our processing stream. Is
there
is a way to QC the results at an individual subject level?
Best, Daria
Daria A. Boratyn, Clinical Research Coordinator MS Imaging Lab Massachusetts General Hospital 149 13th Street | Boston, MA 02129 617-726-7531 tel:617-726-7531
-- Douglas N. Greve, Ph.D. MGH-NMR Center greve@nmr.mgh.harvard.edu mailto:greve@nmr.mgh.harvard.edu Phone Number: 617-724-2358 tel:617-724-2358 Fax: 617-726-7422 tel:617-726-7422
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