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Cobalt therapy is the medical use of gamma rays from the radioisotope cobalt-60 to treat conditions such as cancer.Beginning in the 1950s, cobalt-60 was widely used in external beam radiotherapy (teletherapy) machines, which produced a beam of gamma rays which was directed into the patient's body to kill tumor tissue.
Cobalt-60 (60 Co) is a synthetic radioactive isotope of cobalt with a half-life of 5.2714 years. [ 3 ] [ 4 ] : 39 It is produced artificially in nuclear reactors . Deliberate industrial production depends on neutron activation of bulk samples of the monoisotopic and mononuclidic cobalt isotope 59
Between 1958 and 1972, the Riverside Methodist Hospital in Columbus, Ohio became the first hospital in Central Ohio to develop an extensive cobalt therapy program, where the use of cobalt-60 became the dominant radiation source for treating patients with cancer. In 1973, 30-year-old Joel Axt was hired by the hospital as the resident physicist ...
Cobalt-60 is used as a radiation source for radiotherapy (specifically, cobalt therapy). Cobalt-60 (60 Co) is a synthetic radioactive isotope of cobalt, with a half-life of 5.27 years, and emits highly penetrating gamma rays.
External beam radiation therapy (EBRT) is a form of radiotherapy that utilizes a high-energy collimated beam of ionizing radiation, from a source outside the body, to target and kill cancer cells. A radiotherapy beam is composed of particles which travel in a consistent direction; each radiotherapy beam consists of one type of particle intended ...
Cobalt-60 Teletherapy Capsule. The radiotherapy accident in Costa Rica occurred within the Alcyon II radiotherapy unit at San Juan de Dios Hospital in San José, Costa Rica. It was related to a cobalt-60 source that was being used for radiotherapy in 1996. An accidental overexposure of radiotherapy patients treated during August and September ...
a cylinder of radioactive source material (caesium-137 in the Goiânia incident, but usually cobalt-60) The Goiânia accident [ɡojˈjɐniɐ] was a radioactive contamination accident that occurred on September 13, 1987, in Goiânia , Goiás , Brazil, after an unsecured radiotherapy source was stolen from an abandoned hospital site in the city.
In the Ciudad Juárez cobalt-60 contamination incident, a local resident salvaged materials from a discarded radiation therapy machine containing 6,010 pellets of 60 Co. The transport of the material led to severe contamination of his truck.