How do you become an mri repairman?

Obtain a degree...Preferably a 4 year degree in Biomedical Equipment Technology, or BMET. Start out as a Biomed in a hospital working on basic medical instruments. Keep an eye out for an MRI posting, and apply. The Hospital will send you to OEM training. If the Hospital isn't your first choice, just go with an OEM such as Siemens or GE. They accept summer interns, if you are lucky you may get hired. I have been working for a hospital for 4 years.