You’ve just been in for a visit to your doctor and he’s ordered an MRI. It’s likely that you have heard of MRIs before, but you might have questions as to what is involved. Will it hurt? How much radiation will I be exposed to? A magnetic resonance imaging (MRI) is a painless test that gives doctors images of the soft tissues, organs, and bones of your body by using a strong magnetic field, radio frequency pules, and computer technology. MRIs do not provide the same type of radiation that x-rays do.