ASTM E 242 - 95. Standard Reference Radiographs for Appearances of Radiographic Images as Certain Parameters Are Changed

American Society for Testing and Materials (ASTM). 1995, 3 pages.
This document describes the appearance of a radiographic image where fundamental components of image quality are changed, that is, variables such as whether a X-ray or gamma ray source was used, the characteristics of the radiographic film and intensifying screens, and the geometrical
configuration of the object under investigation as well as its associated radiographic set-up