For an MRI of the head, you lie with your head inside a special machine (scanner) that has a strong magnet. The MRI can show tissue damage or disease, such as infection or inflammation, or a tumor, stroke, or seizure. Information from an MRI can be saved and stored on a computer for more study.
what has been seen cannot be unseen. The act of witnessing something so traumatic or disturbing that it is futilely wished to be unseen. Most commonly experienced on 4chan's /b/ or senior citizen dating websites. Me: Oh hey, look, some Nigerian dude emailed me a file called BlueGoatseWaffles! Maybe its a picture of blue goats doing people stuff...like cooking waffles! Me: What has been seen cannot be unseen.
From liveleak website. WTF video of the day. Remember -- what has been seen, cannot be unseen. This is like... nothing I've ever seen and it's... well, you just have to see for yourself. I'm not sure whether that booger from hell the doc pulled out of the man's nose was a result of sinus infection, nasal fungus, polyps in the nasal cavity or some other growth within the skull, but it's quite possible that it was neither.