Magnetic resonance imaging (MRI) scans produce detailed images of the organs and tissues in the body. Unlike CT scans and X-rays, an MRI does not use ionizing radiation that can be potentially harmful. Instead, it uses radio waves, a magnet, and a computer. Find out what happens during and after an MRI scan.
An MRI scan is the best way to see inside the human body without cutting it open, but that may be little comfort to you when you're getting ready for the exam. Lying perfectly still on a tiny slab in a narrow hole, you might wonder what's happening to your body.