How to convert vertex index to MNI coordinates in a volumetric source space?

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  • MNE version: 1.4.2
  • operating system: Ubuntu 18.04

Hi,

I’m working with a volumetric source model in MNE-Python and would like to convert the source indices (or vertex indices) to MNI coordinates for reporting purpose. Namely, I would like to know where the hot spots are located in the brain, ideally be comparable with previous fMRI literatures. I found the mne.vertex_to_mni() function, but from the documentation and my testing, it seems like this only works for surface source spaces.

Is there a recommended way to obtain MNI coordinates for a given source point (or hot spot) in a volume source space? Any guidance or example code would be greatly appreciated!

Thanks in advance,
Zoe