I’ve had the mechanism of MRIs explained to me any number of times and I’m still none the wiser, but no X-rays are involved; images are obtained using a combination of protons, magic, and an enormous fucking magnet. And I mean enormous, the size and weight of a one-bedroom flat. The MRI checklist asks if the patient’s got a metal heart valve (it would tear out of her now-dead chest at eighty miles an hour and splat onto the machine) or worked in a metal factory (tiny bits of metal would have found their way into her eyes, making both eyeballs explode when she opened the door to the MRI suite).
