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  2. Iodine-123 - Wikipedia

    en.wikipedia.org/wiki/Iodine-123

    Iodine-123 (123 I) is a radioactive isotope of iodine used in nuclear medicine imaging, including single-photon emission computed tomography (SPECT) or SPECT/CT exams. The isotope's half-life is 13.2232 hours; [1] the decay by electron capture to tellurium-123 emits gamma radiation with a predominant energy of 159 keV (this is the gamma primarily used for imaging).

  3. Iodine in biology - Wikipedia

    en.wikipedia.org/wiki/Iodine_in_biology

    Sequence of 123-iodide human scintiscans after an intravenous injection, (from left) after 30 minutes, 20 hours, and 48 hours. A high and rapid concentration of radio-iodide is evident in extrathyroidal organs like cerebrospinal fluid (left), gastric and oral mucosa, salivary glands, arterial walls, ovary and thymus.

  4. Iodine deficiency - Wikipedia

    en.wikipedia.org/wiki/Iodine_deficiency

    Sequence of 123-iodide human scintiscans after an intravenous injection, (from left) after 30 minutes, 20 hours, and 48 hours. A high and rapid concentration of radioiodide is evident in the periencephalic and cerebrospinal fluid (left), salivary glands, oral mucosa, and the stomach.

  5. Isotopes of iodine - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_iodine

    There are 40 known isotopes of iodine (53 I) from 108 I to 147 I; all undergo radioactive decay except 127 I, which is stable. Iodine is thus a monoisotopic element.. Its longest-lived radioactive isotope, 129 I, has a half-life of 16.14 million years, which is far too short for it to exist as a primordial nuclide.

  6. Iodine-125 - Wikipedia

    en.wikipedia.org/wiki/Iodine-125

    Iodine-125 can be used in scanning/imaging the thyroid, but iodine-123 is preferred for this purpose, due to better radiation penetration and shorter half-life (13 hours). 125 I is useful for glomerular filtration rate (GFR) testing in the diagnosis or monitoring of patients with kidney disease .

  7. Iofetamine (123I) - Wikipedia

    en.wikipedia.org/wiki/Iofetamine_(123I)

    Iofetamine (iodine-123, 123 I), brand names Perfusamine, SPECTamine), or N-isopropyl-(123 I)-p-iodoamphetamine (IMP), is a lipid-soluble amine and radiopharmaceutical drug used in cerebral blood perfusion imaging with single-photon emission computed tomography (SPECT).

  8. Ioflupane (123I) - Wikipedia

    en.wikipedia.org/wiki/Ioflupane_(123I)

    The iodine introduced during manufacture is a radioactive isotope, iodine-123, and it is the gamma decay of this isotope that is detectable to a gamma camera. 123 I has a half-life of approximately 13 hours and a gamma photon energy of 159 keV making it an appropriate radionuclide for medical imaging. The solution also contains 5% ethanol to ...

  9. Iodine clock reaction - Wikipedia

    en.wikipedia.org/wiki/Iodine_clock_reaction

    In this protocol, iodide ion is generated by the following slow reaction between the iodate and bisulfite: IO − 3 + 3 HSO − 3 → I − + 3 HSO − 4. This first step is the rate determining step. Next, the iodate in excess will oxidize the iodide generated above to form iodine: IO − 3 + 5 I − + 6 H + → 3 I 2 + 3 H 2 O