Radiography is the use of ionizing radiations to view objects in a way that can't be seen otherwise. It is not to be confused with the use of ionizing radiation to change or modify objects; radiography's purpose is strictly for viewing. Industrial radiography has grown out of engineering, and is a major element of nondestructive testing (NDT). It is a method of inspecting materials for hidden flaws by using the ability of short X-rays and Gamma rays to penetrate various materials. In simple terms, a radiograph is a photographic record produced by the passage of X-rays or gamma rays through an object onto a film or other recording medium (see Figure 1). The developing, fixing and washing of the film after exposure can be performed manually or by automated processing equipment. The development process begins after the film is exposed to the radiation and an invisible change called a latent image develops on the film emulsion.