title: Reducing radiation, revising reference levels.
authors.forename: William R
authors.initials: WR
authors.lastname: Smith
mesh_terms: D003952:Diagnostic Imaging / Q000592:standards*; D017410:Practice Guidelines as Topic; D000069079:Radiation Exposure / Q000032:analysis / Q000592:standards*; D011835:Radiation Protection / Q000379:methods / Q000592:standards*; D011871:Radiology / Q000592:standards*; D011874:Radiometry / Q000379:methods / Q000592:standards*; D012016:Reference Values; D014481:United States