X Ray Film Screen Systems

Screens which absorb the energy in the x-ray beam that has penetrated the Patient and convert this energy into a Light pattern which has as nearly as possible the same information as the original x-ray beam. The more Light a screen produces for a given input of X-Radiation, the less x-ray exposure and thus shorter exposure Time are needed to expose the film. In most film-screen systems, the film is sandwiched between two screens in a cassette so that the emulsion on each side is exposed to the Light from its contiguous screen.