Hello,

Could anyone give me some insight into how freeview projects an overlay onto a surface? For example, I have an overlay generated though mri_vol2surf for subject pq, call it stats.nii. Opening the nifti in MATLAB, I see that the image it stores is a single, flat vector (had about 130,000 entries). I can overlay stats.nii onto a variety of surf files (e.g. sphere.lh, inflated.lh).

So it seems clear that each surf file has its own method for translating the indices in the vector to points on the surface... Is there any way to extract this information from the surf file?

Basically, my goal is to figure out how I can translate coordinates on sphere.?h (theta, phi or x,y,z doesn't matter) to subscripts on my T1.

Any help would be greatly appreciated!

Thank you,

Paul