How can I map those voxels to the cortical region?

[sjlljs176]

Hello!

When I open the h5 files, the data of voxels have the shape(N, 81126).
But through the pycortex lib, I find that **.nii.gz have the shape(54, 84, 84).
The different shapes between them make me confused.

[dyhan316]

it's probably cuz not all the fMRI data are used (i.e. not all the brain voxels are used)