CT with SEEG electrodes

I have a post-implantation CT with SEEG electrodes. I corregistered with MRI-freesurfer data. How can I detect the location of the electrodes using CT image?

You may follow the procedure described for post-op MR implantations: https://neuroimage.usc.edu/brainstorm/Tutorials/ECoG?highlight=(ecog)#Edit_the_contacts_positions