The source of radiation is positioned on the other side of the subject some distance
away, so that the radiation passes through the subject and on to the film. After the
exposure period the film is removed, processed, dried, and then viewed by
transmitted light on a special viewer.
Various radiographic and photographic accessories are necessary, including such
items as radiation monitors, film markers, image quality indicators, darkroom
equipment, etc. Where the last is concerned there are many degrees of
sophistication, including fully automatic processing units. These accessories are the
same for both X and Gamma radiography systems.
Also required are such consumable items as radiographic film and processing
chemicals.