title: Verification timer for radiation therapy machines.
abstract: Many cobalt and x-ray therapy machines use mechanical timers to control the given dose. There is no other timer on the machine to veryfy that the correct time was set or that the timer did not malfunciton. This article describes a digital timer that has been installed on the MIR therapy machines as a lapsed-time indicator.
mesh_terms: D003037:Cobalt Radioisotopes; D011867:Radioisotope Teletherapy / Q000295:instrumentation; D011878:Radiotherapy / Q000295:instrumentation*; D011879:Radiotherapy Dosage; D013995:Time
chemical_list: D003037:Cobalt Radioisotopes