title: Beam anomaly for a cobalt-60 teletherapy machine.
abstract: A beam anomaly due to trimmer bars for a cobalt teletherapy machine and the possible consequences in clinical work are reported.
mesh_terms: D003037:Cobalt Radioisotopes; D006801:Humans; D011832:Radiation Injuries / Q000209:etiology*; D011867:Radioisotope Teletherapy / Q000009:adverse effects / Q000295:instrumentation
chemical_list: D003037:Cobalt Radioisotopes