title: Rare-earth screens versus calcium tungstate screens.
mesh_terms: D017610:Calcium Compounds; D008674:Metals, Rare Earth; D011856:Radiographic Image Enhancement / Q000295:instrumentation; D014414:Tungsten; D017973:Tungsten Compounds; D014963:X-Ray Intensifying Screens
chemical_list: D017610:Calcium Compounds; D008674:Metals, Rare Earth; D017973:Tungsten Compounds; C018858:calcium tungstate; D014414:Tungsten