Magnetic Resonance Imaging (MRI) is one of the methods we use for looking inside the body. Instead of x-rays, the scanner works with magnetic fields and radio-waves to produce clear pictures of the head, spine, joints or almost all other parts of the body. The scanner consists of a very strong magnet with a radio transmitter and receiver. These instruments gather information which produce images that are used to distinguish normal healthy tissue from diseased or damaged tissue.