Dear Brainstorm users,
Is it possible to import MNE source space model(*.fif file resulted from mne_setup_source_space command) to Brainstorm?
How can I transfer MNE coordinate system (MRI surface RAS) to Brainstorm one?
Thank you.
Is it possible to import MNE source space model(*.fif file resulted from mne_setup_source_space command) to Brainstorm?
No, not for the moment.
I'm not sure how difficult it would be to implement, because the data structures for saving anatomical information are very different in MNE and Brainstorm.
How can I transfer MNE coordinate system (MRI surface RAS) to Brainstorm one?
This is a difficult question, as there are not necessarily equivalences between coordinate systems.
Brainstorm saves everything in CTF coordinates, based on three anatomical fiducials NAS/RPA/LPA:
https://neuroimage.usc.edu/brainstorm/CoordinateSystems#Subject_Coordinate_System_.28SCS_.2F_CTF.29
MNE doesn't need this anatomical reference. If you can identify how to transform these surface RAS coordinates into the scanner coordinates from the original MRI (name "world coordinates" in Brainstorm: https://neuroimage.usc.edu/brainstorm/CoordinateSystems#World_coordinates), then you can use cs_convert to convert from 'world' to 'scs'.
https://neuroimage.usc.edu/brainstorm/CoordinateSystems#Converting_between_coordinate_systems
I'm sorry, I guess my answers won't help you much. Converting between coordinates systems is always complicated... Unless you are very familiar with this topic and comfortable both in Matlab and Python programming, I'd recommend you go for recomputing a different anatomy and forward model.