Hi Michael

you can use either --projfrac-avg or --projdist-avg (dist I guess if you want to specify 10mm). Note that this is an average along 1D (the surface normal direction), not in a volume window

cheers Bruce On Wed, 27 Feb 2019, Michael Jordan wrote:

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Hi Bruce,

thank you it worked!

Another short question:

I want mri_surf2vol to assign the average of all volume voxel values within 10 mm to the corresponding vertices. So if there is only one voxel value greater than zero in the volume, all vertices which are closer than 10 mm should get that value (or the mean if there is more than one value). Can I use ' --projdist 10' for this purpose?

Thank you!!

Cheers, Michael

Am Mo., 18. Feb. 2019 um 15:01 Uhr schrieb Bruce Fischl fischl@nmr.mgh.harvard.edu: Hi Michael

  you can use --regheader, which uses the ras2vox matrices to compute the
  registration (which is also what freeview does).

  cheers
  Bruce
  On Mon, 18 Feb
  2019, Michael Jordan wrote:

  >
  >         External Email - Use Caution        
  >
  > Hi,
  >
  > i would like to sample the t-values of a SPM output volume (spmT_0001.nii) onto the
  pial surface of
  > the same subject.
  > The volume is already aligned to the surface files (so if I view the volume as well as
  the surface
  > files in Freeview they are already aligned).
  >
  > Therefore I am unsure how to use mri_vol2surf because from my point of view I do not
  need any
  > registration (srcreg).
  > Nevertheless the registration is required to run the command. I only found the
  --mni152reg option to
  > avoid specifying a registration.
  >
  > How I should use the mri_vol2surf command to sample the volume onto the pial surface
  of the same
  > subject under the condition that
  > surface and volume are already aligned?
  >
  > Thank you!
  >
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