The first thing that occurred to me, is "How do you show video to people in an MRI?" My scan involved wearing headphones made entirely of plastic[1] due to the fact you're inside a ridiculously strong magnetic field. They didn't actually contain the audio speakers - they were acoustically coupled to something a few metres away.
I suppose if it were properly anchored / built into the machine, you might be able to mount an LCD panel, and then somehow calibrate around it. Alternatively, something complicated involving projection and mirrors, maybe. The scanning tunnel is pretty damn narrow though.
It's strange, but when reading about all sorts of interesting science, I end up wondering about the methodology sometimes more than the actual results.
Having done this (showing video to people in an MRI), I think I'm qualified to respond.
There are two methods we've used, one was a goggle system where an array of optical fibers, one per pixel, are brought from the scanner tube to the control room and coupled to a LED display. The resolution is atrocious, and the thing is heavy, but it gets attached to the head coil so the person inside does not have to bear the weight.
The method we are using now is to attach a mirror to the head coil, and have a huge flatscreen outside the tube. You show mirrored images on the screen, and since the screen is big enough it covers the entire visual field. Works better.
Might I suggest a projector, with a zoom showing on a small piece of frosted plexi? I have used this method to project an image onto a "screen" that was underwater (and quite invisible until struck by the projector beam).
I suppose if it were properly anchored / built into the machine, you might be able to mount an LCD panel, and then somehow calibrate around it. Alternatively, something complicated involving projection and mirrors, maybe. The scanning tunnel is pretty damn narrow though.
It's strange, but when reading about all sorts of interesting science, I end up wondering about the methodology sometimes more than the actual results.
[1] something a bit like these: http://www.scansound.com/xcart/product.php?productid=16172&#... Gave me flashbacks to X-Men: http://comicattack.net/wp-content/uploads/2010/02/42.jpeg :)