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The radioactive decay process for each radioisotope is unique and is measured with a time period called a half-life.One half-life is the time it takes for half of the unstable atoms to undergo radioactive decay.
Radioisotopes are radioactive isotopes of an element.A radiopharmaceutical is a molecule that consists of a radioisotope tracer attached to a pharmaceutical.After entering the body, the radio-labelled pharmaceutical will accumulate in a specific organ or tumour tissue.Also used to irradiate fruit fly larvae in order to contain and eradicate outbreaks, as an alternative to the use of toxic pesticides. Used to trace sand movement in river beds and on ocean floors, and to trace sand to study coastal erosion.Also used to trace factory waste causing ocean pollution, and to study sewage and liquid waste movements. Nuclear medicine uses small amounts of radiation to provide information about a person's body and the functioning of specific organs, ongoing biological processes, or the disease state of a specific illness.