Iodine, radioactive
An isotope of the chemical element iodine that is radioactive. Radioactive iodine is used in diagnostic tests as well as in radiotherapy of an hyperactive thyroid gland (hyperthyroidism), most often due to Graves disease. For hyperthyroidism, Radioactive iodine is administered in capsule form on a one- time basis. It directly radiates thyroid tissues, thereby destroying them. It takes 8-12 weeks for the thyroid to become euthyroid (normal) after treatment. The majority of patients undergoing this treatment with radioactive iodine eventually become hypothyroid, which is easily treated using thyroid hormones (levothyroxine). Radioactive iodine should not be used during pregnancy or breast feeding. Radioactive iodine is the preferred initial therapy for the hyperthyroidism of Graves disease in North America while antithyroid drugs are used as the first line of treatment in most of the rest of the world. Radioactive iodine is also known as radioiodine.

Medical dictionary. 2011.

Look at other dictionaries:

  • 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 — An essential element in the diet used by the thyroid gland to make thyroid hormones. The two most important thyroid hormones are thyroxine (T4) and triiodothyronine (T3). Thyroxine (T4) has four iodine molecules attached to its structure, while… …   Medical dictionary

  • iodine — n. an element required in small amounts for healthy growth and development. An adult body contains about 30 mg of iodine, mostly concentrated in the thyroid gland: this gland requires iodine to synthesize thyroid hormones. A deficiency of iodine… …   The new mediacal dictionary

  • 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-125 — (125I) is a radioisotope of iodine which has uses in biological assays and in radiation therapy to treat prostate cancer and brain tumors. Its half life is around 60 days and it emits gamma rays with maximum energies of 35 keV, some of which are… …   Wikipedia

  • Iodine-129 — (129I) is a radioisotope of iodine. Formation and decay129I is primarily formed from the fission of uranium and plutonium in nuclear reactors. Significant amounts were released into the atmosphere as a result of nuclear weapons testing in the… …   Wikipedia

  • iodine-125 — Radioactive iodine isotope that decays by K capture (internal conversion) with a half life of 59.4 days; used as a label in immunoassay and in imaging; formerly used as a tracer in thyroid studies and as a l …   Medical dictionary

  • Iodine-123 — (123I) is a radioactive isotope of iodine used in nuclear medicine imaging, including single photon emission computed tomography (SPECT). Iodine 123 is produced in a cyclotron by proton irradiation of enriched xenon. Its half life is 13.22 hours; …   Wikipedia

  • Iodine-124 — or 124I is an isotope of iodine. This isotope is not stable and therefore is radioactive, also called a radioisotope. It has a half life of 4.18 days. Modes of Decay: 74.4% electron capture, 25.6% positron emission. 124I decays to… …   Wikipedia

  • Radioactive scrap metal — is the situation when radioactive material enters the metal recycling process known as the scrap metal trade. Overview A lost source accident [P Ortiz, V Friedrich, J Wheatley and M Oresegun, [http://www.iaea.org/Publications/Magazines/Bulletin/Bu… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”