Hi Jennifer, remember to send questions to the freesurfer list, thanks!
Answers below
On 4/3/2023 4:01 AM, Jennifer Kilmer wrote:
>
> External Email - Use Caution
>
> Hi Douglas,
>
> Thank you for your response. I have a few more questions;
>
> We can do the analysis in the surface space, but how could we move the
> results from the surface space (FS average) to the original subject
> volumetric space?
Do you need to go to fsaverage space? If all you want to do is the
surface-based smoothing, then you can do it in the native space, then
use mri_surf2vol to map it back into the volume. Run it with --help. Use
method2 with --fillribbon and --surfval as your surface pet data.
>
> "Why not map the individual to fsaverage space and do the comparison
> there?"
> We already do that in MNI space using volume smoothing and go back to
> the individual subject space. We want to use the surface smoothing as
> it's "... constrained to be only within cortical GM" (PMC4008670). As
> we have to compare also with volumetric maps from electrophysiology
> data, we need to go back to the individual volumetric space.
>
>
> I hope this clears things up, please let me know if there is anything
> we can try to achieve this.
>
> Jennifer