title: The use of rare-earth intensifying screens in obstetric radiography.
mesh_terms: D005260:Female; D006801:Humans; D008674:Metals, Rare Earth; D009774:Obstetrics / Q000295:instrumentation*; D011856:Radiographic Image Enhancement; D011859:Radiography / Q000295:instrumentation; D013679:Technology, Radiologic / Q000295:instrumentation*
chemical_list: D008674:Metals, Rare Earth