[Mne_analysis] MNI Coords from SourceSpaces

[Bear, Joshua]

Hi MNE Folks, 

I am trying to identify the MNI coordinates from a SourceSpaces object from a specific individual (i.e. not fsaverage). 

If src is the result from mne.set_volume_source_space(): 
I found that I can identify the indices of the relevant vertices from: src[0][‘vertno’]
I can then use vertex_to_mni for the vertex; however, I cannot figure out how to identify which hemisphere a vertex belongs to, and vertex_to_mni requires a selection. 
My source space has coordinate_frame=MRI (surface RAS).

Does anyone know how to extract the MNI coordinates for the sources in a volume source space?

Thanks for any help,
Josh


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