Interesting about MRI, I just read this in another thread strange that it pops up in both places:
And now with what you're bringing up (PsychedelicRelic), that sort of explains the "scanning" / MRI-like functions we have speculated about Smokey. If Smokey has the ability to shape-shift and change its size at will, couldn't just a single particle possibly accomplish the same "scanning" ability (photographing the images on the retina)? And in doing this, basically go undetected.
It also ties back with what we came up with long ago that Smokey is still functioning as designed (reporting / transmitting the images he acquires) but perhaps something about him is awry and they don't have complete control.... sort of like a Frankenstein's monster."
(the retina images comes from a Tesla theory that memories are shown on the retina and that we could see memories if there were an adequate machine to extract that image)
*refer to "this could be THE explaination" thread in spoiler theories and speculation