[egocodedinsol]

Your description of the localization approach is accurate, but this system is almost certainly Brainsight, given the screen shown in the image at the bottom, the IR camera in that image, and the shape of the tracker arm.

The general approach is straightforward: MRIs are have real-world coordinates. Anything on the head (TMS, EEG, a surgical instrument) also has real-world coordinates. To co-register the two, you need to associate 1) markers at MRI time 2) markers at TMS time.

Once you have that correspondence, you can position any other objects relative to either one, like surgical instruments with reflective markers or TMS systems or whatever.

[nvrspyx]

Looking at it again, you’re right. That isn’t Localite. I should’ve said localization system instead. I’m not familiar with Brainsight and I haven’t been involved with the research using Localite in a couple of years, so I missed that.