Doctors must work out the danger to nearby healthy tissue before giving this treatment. The cancer cells absorb radiation from the material and receive a high dose of energy. Medical contaminationĬancer tumours can be treated by injecting them with a radioactive material. Īs with irradiation, contamination can be very useful as well as being potentially harmful. An apple exposed to the radiation from cobalt-60 is irradiated but an apple with cobalt-60 injected into it is contaminated. Contamination occurs if an object has a radioactive material introduced into it.
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