I mean this is hypothetical but they could have told him the general stuff without the details of what's actually wrong. Like "something is wrong with your pancreas" instead of "your pancreas is utterly failing because of xyz". I've personally experienced doctors doing this with my own medical issues (I found out later by switching doctors) and while it's salacious to not tell a patient the entire truth, some asshole doctors don't. Add in that patients with dementia are often viewed as incapable so aren't informed of everything as much and yeah I could see it happening. Especially since if he has dementia then someone is likely more knowledgeable of that situation than him and likely would have been informed of the details of the MRI in full instead of him. This also isn't far off from what was going on with Reagan.

But this is, again, a hypothetical and it's much more likely he doesn't remember or he is lying.

If you mean the washcloth then no, it's just a normal washcloth that you would use at home. They just lay it over my eyes and I can't see the cage so it's easier to convince myself it's not there.

If you end up getting another one, they say that you shouldn't move at all during the scan and that's not quite true. There are multiple scans and you can quickly adjust in the lul between loud dub step noises. When I'm not sleeping through the scan I'll take those few seconds to adjust and get more comfy. Just some advice. Those spots also might be harder to hear if you listen to music just fyi, I don't.