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:
External Email - Use Caution
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
<fis...@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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