A nondestructive method that used gamma rays or x-rays for detecting discontinuities in materials and components using penetrating radiation and recording media to produce an image. A visible image viewed for acceptance which is created by penetrating radiation acting on a recording media, either film on a viewer or electronic images on a monitor.
In Radiographic Testing, the test portion is placed between the radiation and the detector. Differences in material density and thickness of the test section will attenuate or reduce the penetrating radiation through interaction processes involving scattering or absorption. The absorption difference is then recorded on a detector or electronic means. In industrial radiography, there are several imaging methods, techniques for displaying the final image: Film Radiography, Realtime Radiography (RTR), Computed Tomography (CT), Digital Radiography (DR), and Computed Radiography.