title: [Technical features and roles of cobalt-57 flood sources for daily quality control of gamma cameras].
abstract: Quality control (QC) detects changes in the performance of gamma cameras that could adversely affect interpretations of clinical studies. We used plate and sheet (57)Co flood sources to measure extrinsic uniformity during daily QC. Each source, when placed on the top of a collimated detector, allowed the acquisition of uniform images from both detectors, thus reducing the amount of time needed to perform daily QC. No serious problems with the gamma camera system were revealed by visual checks, and changes in detector sensitivity were rapidly determined by observing daily variations in the measured values of extrinsic uniformity. Furthermore, (57)Co flood sources confer advantages in that they shorten the time required for preparation of flood sources and reduce the consequent exposure of medical staff to radiation.
authors.affiliation: Department of Nuclear Medicine, Cancer Institute Hospital of Japanese Foundation for Cancer Research.
authors.forename: Kei
authors.initials: K
authors.lastname: Wagatsuma
authors.forename: Kenta
authors.initials: K
authors.lastname: Miwa
authors.forename: Kenta
authors.initials: K
authors.lastname: Akimoto
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Tsushima
authors.forename: Noriaki
authors.initials: N
authors.lastname: Miyaji
authors.forename: Takuro
authors.initials: T
authors.lastname: Umeda
authors.forename: Taisuke
authors.initials: T
authors.lastname: Murata
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Takiguchi
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Koizumi
mesh_terms: D003037:Cobalt Radioisotopes / Q000032:analysis; D015902:Gamma Cameras / Q000592:standards*; D006801:Humans; D011786:Quality Control
chemical_list: D003037:Cobalt Radioisotopes