title: How good is the erbium filter?
authors.affiliation: Department of Radiology, Cheltenham General Hospital.
authors.forename: C
authors.initials: C
authors.lastname: Howard
mesh_terms: D003362:Cost-Benefit Analysis; D004871:Erbium; D005069:Evaluation Studies as Topic; D005374:Filtration / Q000295:instrumentation*; D006801:Humans; D011829:Radiation Dosage; D011859:Radiography / Q000191:economics / Q000295:instrumentation*; D011874:Radiometry / Q000379:methods; D012867:Skin / Q000528:radiation effects
chemical_list: D004871:Erbium