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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iodine-131 -.wən-.thərt-ē-'wən n a heavy radioactive isotope of iodine that has the mass number 131 and a half-life of eight days, emits beta particles and gamma rays, and is used esp. in the form of its sodium salt in the diagnosis of thyroid disease and the treatment of goiter

Medical dictionary. 2011.

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  • Iodine-131 — Infobox isotope alternate names =Radioiodine symbol =I mass number =131 mass = num neutrons =78 num protons =53 abundance = halflife =8.0197 days error halflife = background =#c9F text color = decay product = decay symbol = decay mass = decay… …   Wikipedia

  • iodine 131 — noun : a heavy radioactive isotope of iodine having the mass number 131 and a half life of 8 days that is produced in the fission of uranium or by bombardment of tellurium with neutrons and that is used especially in the form of sodium… …   Useful english dictionary

  • iodine-131 — noun heavy radioactive isotope of iodine with a half life of 8 days; used in a sodium salt to diagnose thyroid disease and to treat goiter • Hypernyms: ↑iodine, ↑iodin, ↑I, ↑atomic number 53, ↑radioisotope * * * iodine 131 noun A short lived… …   Useful english dictionary

  • Iodine 131-metaiodobenzylguanidine — (abbreviated as 131I MIBG) is a radioiodinated synthetic analogue of the neurotransmitter norepinephrine. Meta iodobenzylguanidine localizes to adrenergic tissue and, in radioiodinated forms, may be used to image or eradicate tumor cells that… …   Wikipedia

  • iodine 131 — Chem. a radioactive isotope of iodine having a mass number 131 and a half life of 8.6 days, used in the diagnosis and treatment of disorders of the thyroid gland. Cf. radioiodine. * * * …   Universalium

  • iodine 131 — a radioactive isotope of iodine, atomic mass 131, having a half life of 8.04 days; it emits beta particles (0.607, 0.81, 0.336 MeV) and gamma rays (0.080, 0.284, 0.364, 0.637, 0.723 MeV) and is used as a tracer in diagnostic imaging and as a… …   Medical dictionary

  • iodine-131 — noun The radioactive isotope of iodine, , having a half life of 8 days; used as a medical tracer Syn: radioiodine …   Wiktionary

  • Iodine — (IPAEng|ˈaɪədaɪn, ˈaɪədɪn, or IPA|/ˈaɪədiːn/; from el. ιώδης iodes violet ), is a chemical element that has the symbol I and atomic number 53. Naturally occurring iodine is a single isotope with 74 neutrons. Chemically, iodine is the least… …   Wikipedia

  • Iodine (disambiguation) — Iodine is a chemical element.Iodine may also refer to:*Isotopes of iodine: **Iodine 123 **Iodine 124 **Iodine 125 **Iodine 129 **Iodine 131*Iodine clock reaction *Iodine deficiency *Iodine Recordings *Iodine test *Iodine value *Tincture of… …   Wikipedia

  • iodine — [ī′ə dīn΄, ī′ədin; ] Brit & among chemists [, ī′ədēn΄] n. [Fr iode, iodine (< Gr iōdēs, violetlike < ion, a violet + eidos, form: see OID) + INE3] 1. a nonmetallic chemical element, one of the halogens, consisting of grayish black crystals… …   English World dictionary

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