system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are MRI's so huge? why didn't they get smaller in size like computers did?.

Computers went from the size of a room to fit in our pockets, so why are MRI's any different?.
gpt
MRI's require a strong magnetic field around your body.  Making a strong magnetic field requires a large magnet.  In some cases, the technology has gotten better and there are "open MRI" machines  where what can be made smaller has been, and you no longer travel through a tunnel to get scanned.  At the very least though the machine must be able to generate a magnetic field around whatever is being scanned (such as your body).