title: Collimator integrity.
authors.forename: Frank P
authors.initials: FP
authors.lastname: DiFilippo
authors.forename: Sue H
authors.initials: SH
authors.lastname: Abreu
authors.forename: Haresh
authors.initials: H
authors.lastname: Majmundar
mesh_terms: D002138:Calibration; D019544:Equipment Failure Analysis / Q000592:standards*; D015902:Gamma Cameras / Q000592:standards*; D017410:Practice Guidelines as Topic; D011785:Quality Assurance, Health Care / Q000592:standards*; D011877:Radionuclide Imaging / Q000295:instrumentation* / Q000592:standards*