Analysis of secondary screening with special reference to grids for abdominal radiography.
D006801:Humans; D008962:Models, Theoretical; D011835:Radiation Protection / Q000295:instrumentation / Q000379:methods*; D011859:Radiography / Q000295:instrumentation; D011860:Radiography, Abdominal; D012542:Scattering, Radiation; D013679:Technology, Radiologic / Q000295:instrumentation