MRI
An MRI scan uses a strong magnetic field and radiowaves to create pictures on a computer of tissues, organs and other structures inside your body.
The MRI machine is like a tunnel about one-and-a-half metres long surrounded by a very large circular magnet. You lie on a flat bed which then slides into the scanner. A special device that works like an aerial may be placed somewhere close to your body part that is being examined. This picks up the radio signals emitted from your body. You will need to keep still for a few minutes for each series of pictures, otherwise they may be blurred. The scan itself is painless. Each scan takes between 15 and 45 minutes.