An X-ray is used to produce images of the inside of your body. They are quick and painless. X-rays use radiation that is absorbed at different rates by different parts of the body. After it has passed through the body it is picked up by a detector and turned into an image. Denser parts of your body, such as your bones, show up as white areas while softer parts, such as the internal organs, appear darker.
Fluoroscopy is a special form of X-ray that allows the radiographer to study movement within the body. During a fluoroscopy examination, a constant stream of X-rays is taken so that changes can be monitored as they occur. These images are transmitted to a monitor, allowing the radiographer to see what is happening in real time.