title: Scattered radiation from trimmer bars in the cobalt-60 teletherapy machines.
abstract: The amount of scattered radiation resulting from four Cobalt-60 teletherapy units in four different hospitals when trimmer bars were fully extended was studied. Scatter was present for all machines checked at between 10% and 20% of the central axis dose. Clinical significance is also discussed.
mesh_terms: D003037:Cobalt Radioisotopes; D004781:Environmental Exposure; D006801:Humans; D010564:Personnel, Hospital; D011835:Radiation Protection; D011872:Radiology Department, Hospital; D011878:Radiotherapy / Q000295:instrumentation*; D012542:Scattering, Radiation
chemical_list: D003037:Cobalt Radioisotopes