In medicine, "imaging" is the term used for any method to take pictures of bones and organs inside the body. One of the most basic imaging methods is with x-ray radiation. X-rays can help your health care provider find the cause of a medical problem. For example, x-rays may be used to find a tumor, kidney stones , or a developmental problem.
An x-ray (or conventional radiology) is a form of radiation produced by special machines that take pictures of the inside of your body. Structures that are dense, like bones, look white on the film. Structures that contain air, like your lungs, look black. Muscle, fat and fluid will show as different shades of gray.
For more information visit our UrologyHealth.org article on x-rays.