I recognise MRI, if that's any help! Don't know what it stands for but I think my Ma had one done. I guess what people recognise really will be governed by how much medical stuff has gone on in their lives. I think I had ECG in mind because I got hooked up to a monitor to check my heart rate (or something) the other week. All of which makes it difficult to write for, I guess! Maybe your actual LoM fandom is more attuned to this kind of thing than your average, run of the mill FS and Stargate fan, lol.