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Nuclear medicine

Nuclear medicine is a branch of medicine and medical imaging that uses unsealed radioactive substances in diagnosis and therapy.

These substances consist of radionuclides, or pharmaceuticals that have been labelled with radionuclides (radiopharmaceuticals).

In diagnosis, radioactive substances are administered to patients and the radiation emitted is measured.

Note:   The above text is excerpted from the Wikipedia article "Nuclear medicine", which has been released under the GNU Free Documentation License.
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