title: The variable filter dial.
authors.affiliation: Mayo Clinic/Mayo Foundation, Rochester, MN
authors.forename: J G
authors.initials: JG
authors.lastname: Stears
authors.forename: J G
authors.initials: JG
authors.lastname: Gray
authors.forename: E D
authors.initials: ED
authors.lastname: Frank
mesh_terms: D000535:Aluminum; D005374:Filtration / Q000295:instrumentation*; D006801:Humans; D011835:Radiation Protection; D013679:Technology, Radiologic / Q000295:instrumentation* / Q000592:standards
chemical_list: D000535:Aluminum