title: Evaluation of mammographic screen-film systems.
abstract: Four screen-film systems were evaluated for their imaging properties in mammography, Modulation-transfer functions were measured at 40 kVp. Absolute screen-film sensitivities in mR and entrance exposures were measured with tungsten and molybdenum target tubes. Five radiologists viewed radiographs of a phantom containing microgranules of SiC ranging in diameter from 590 to 120 micrometer. The Rarex-B screen--composed of yttrium oxysulfide--performed best, allowing phantom radiographs at 185 mR with image quality sufficient to demonstrate microgranules greater than 330 micrometer in dimension.
mesh_terms: D001943:Breast Neoplasms / Q000000981:diagnostic imaging*; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008327:Mammography / Q000295:instrumentation*; D008961:Models, Structural; D008982:Molybdenum; D011829:Radiation Dosage; D013679:Technology, Radiologic / Q000295:instrumentation; D014414:Tungsten
chemical_list: D008982:Molybdenum; D014414:Tungsten