Hi all,

I need to calculate the surface area of my ROIs.  I can't seem to figure this out!

Ultimately, I need to generate a single number for ROIs in niftii format.  These ROIs are manually drawn based on anatomy and contain 100-1000 voxels, so this calculation needs to be automated.

This will be a part of a much larger script I need to be compatible with all of our lab computers, so I'd prefer to use one of, or a combination of, these software packages: Freesurfer, AFNI, FSL.

So far, I've been able to turn these ROIs into a Freesurfer surface with "mri_tesselate -a", but am stuck here otherwise.  I am not tied to this pipeline but wanted to mention it.

Any thoughts?  Is there a way to do this calculation?

Thank you!

- Graduate Student