Re: [Freesurfer] Pial surface with point-to-point correspondance between subjects

you can just compute the jacobian of the ?h.sphere.reg for deformation. I'm not sure I understand how you would use an L2 metric. There are tools in AFNI/SUMA for converting a freesurfer surface to a standard mesh that you could use

cheers Bruce

On Wed, 29 Oct 2014, Alexandre Routier wrote:

Hello Bruce,

I would like to build an atlas of subcortical structures and pial surface on my population of study. But given the anatomical complexity of the pial surface (and the number of points), I would like to use point-to-point correspondence so as to have a L^2 metric (I use another metric for subcortical structures). I don't know if I am clear enough but since I estimate the template and the variability between the template and the subjects, I would like to detect information such as atrophy thanks to the deformation parameters.

Is there any solution?

Alexandre

2014-10-29 13:49 GMT+01:00 Bruce Fischl fischl@nmr.mgh.harvard.edu: Hi Alexandre

  can you tell us what you want to do with the point-to-point
  correspondence? We don't usually map surfaces into a common
  space since
  we want to have  uniform resolution/sampling in the individual
  coords.

  cheers
  Bruce


  On Wed, 29 Oct 2014, Alexandre Routier wrote:

  > Dear all,
  >
  > I would like to work with the pial surfaces of my database and
  more
  > particularly with a point-to-point correspondance between each
  subject. But
  > I didn't find how to do that, only for longitudinal analysis
  of a single
  > subject which I am not interested.
  >
  > Thanks in advance for you help,
  > Alexandre
  >
  >

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