Dear Francois,
Thanks for your quick answer.
Unfortunately this method doesn’t work for some reason.
I have a file with the correct electrode locations along with the 6 fiducial points in the freesurfer space:
"31,124,227,NAS
192,159,123,LPA
58,150,128,RPA
126,108,141,AC
126,110,115,PC
131,39,128,IH
189.2381,79.10872,129.3728,TSG6
191.3195,88.22131,134.0091,TSG12
191.141,96.49012,139.4339,TSG18
189.5289,108.1668,143.3309,TSG24
…"
Whether I try to import this file as a channel file, or to use this file as an electrode position file to update the positions of a dummy channel file, the electrodes are situated an order of magnitude away from where they should land, although in the first case it seems the first 3 fiducials (NAS, LPA, RPA) are effectively read out by brainstorm (they don’t appear in the subsequently created channel file).
I double checked the fact that the fiducials and the electrode positions are indeed in the same space. So it seems there is a problem with the matching of the fiducials when importing a channel file…
I am quite confused as I am doing basically the exact same thing as a colleague. I tried on another computer and the problem persists. Would you happen to have any suggestion?
Thank you very much !
Tom