title: Steel trimmer for use with 60Co tangential fields.
abstract: A prototype steel trimmer provided by Atomic Energy of Canada Limited was modified for use with tangenital wedged 60Co fields. The trimmer virtually eliminated the penumbra of the wedged fields, permitting a more uniform irradiation of the chest wall. There was no significant change in the wedge transmission factors for the trimmed and untrimmed fields.
mesh_terms: D003037:Cobalt Radioisotopes / Q000627:therapeutic use*; D006801:Humans; D011867:Radioisotope Teletherapy / Q000295:instrumentation; D011871:Radiology / Q000295:instrumentation*
chemical_list: D003037:Cobalt Radioisotopes