Hi Bianca,
I haven’t been working yet on conversion systems for the intra-cranial electrode positions.
I will ask our collaborators who use these tools to describe what is the best way to have electrode positions co-registered with the MRI.
You said you have your got your electrodes positions from the FreeSurfer folder?
In what format are they stored?
Could you send me an example so I can add an easy way to read them? The full FreeSurfer folder could help.
(zip the entire folder, upload it somewhere, then click on my username on this forum to send me the link in a separate email).
Thanks,
Francois