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iodine 131

Pronunciation: i'o-din

Definition: A radioactive iodine isotope; beta and gamma emitter with a half-life of 8.1 days; used as a tracer in thyroid studies, as therapy in hyperthyroidism and thyroid cancer, and as a label in immunoassay and imaging; formerly used as therapy in heart disease.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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