What is it ?
X-rays are a form of radiant energy, Which can penetrate the body, capturing the resulting shadows & reflections on the photographic plate. The radiologist can view these on photographic film or on a TV or computer monitor. The films created by x-rays show different features of the body in various shades of gray.

Some X-rays exams improve visibility by using contrast, a range of substances which may be introduced into the patient by swallowing, injection, or enema.

In fluoroscopy X-rays are used to capture a moving image of an organ while it is functioning.