An MRI Scanner consists of a large and very strong magnet in which the patient lies. A radio wave antenna is used to send signals to the body and then receive signals back. These returning signals are converted into pictures by a computer attached to the scanner. Pictures of almost any part of your body can be obtained at almost any particular angle and plane. The triple-layered icing on the cake is, MRI has absolutely no side effects, it's completely painless and is non-invasive as well.