《英文msh詞典》System,X-Ray Film-Screen
[入口詞] System,X-Ray Film-Screen
[主題詞] X-Ray Intensifying Screens
[英文釋義] 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.