iodine 125

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 (I) [i´o-dīn]
a chemical element, atomic number 53, atomic weight 126.904. (See Appendix 6.) Iodine is essential in nutrition, being especially prevalent in the colloid of the thyroid gland. It is used in the treatment of hypothyroidism and as a topical antiseptic. Iodine is a frequent cause of poisoning (see iodism). Deficiency of iodine causes goiter. Since iodine salts are opaque to x-rays, they can be combined with other compounds and used as contrast media in diagnostic x-ray examinations of the gallbladder and kidneys.
iodine 123 a radioactive isotope of iodine having a half-life of 13.2 hours and emitting gamma rays and x-rays. It is used in diagnostic imaging and as radiation sources in radiation therapy. Symbol 123I.
iodine 125 a radioisotope of iodine having a half-life of 60.14 days and emitting gamma rays; used as a label in radioimmunoassays and other in vitro tests, and also for thyroid imaging. Symbol 125I.
iodine 131 a radioactive isotope of iodine having a half-life of 8.04 days and emitting beta particles and gamma rays. It is used as a tracer in diagnostic imaging and as a radiation source in radiation therapy. Symbol 131I.
protein-bound iodine a test of thyroid function; see also protein-bound iodine test.
radioactive iodine radioiodine.
iodine solution a transparent, reddish brown liquid, each 100 ml of which contains 1.8 to 2.2 g of iodine and 2.1 to 2.6 g of sodium iodide; a local antiinfective agent.
strong iodine solution Lugol's solution.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

i·o·dine 125

a radioisotope of iodine with decay by K capture (internal conversion) and 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 label in imaging.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
Iodine-125 seeds strand for treatment of tumor thrombus in inferior vena cava: An experimental study in a rabbit model.
We acknowledge the assistance of the Department of Radiation Oncology, Faculty of Health Sciences, University of Pretoria, for external beam radiotherapy, and Drs Clare Stannard and Karin Lecouna of the Departments of Radiation Oncology and Opthalmology, respectively, Groote Schuur Hospital and University of Cape Town, for iodine-125 brachytherapy.
Rectal toxicity and rectal dosimetry in low-dose-rate iodine-125 permanent prostate implants: A long-term study in 1006 patients.
Survival rates are 82% at five years for iodine-125 brachytherapy (17) and 84% for ruthenium-106.
Brian Moran compares Cesium-131 and Iodine-125 treatment related morbidities such as sexual dysfunction and incontinence in low to intermediate risk patients.
Key words: calibration; exposure rate; free-air chamber; iodine-125 seed; re-entrant chamber; standards.
Ten-year disease free survival after transpermeal sonography-guided Iodine-125 brachytherapy with or without 45-gray external beam irradiation in the treatment of patients with clinically localized, low to high Gleason grade prostate carcinoma.
In June, FDA approved the company's first medical product, implantable metal seeds containing iodine-125 for treating prostate-cancer patients.
Labeling of DARPin 9_29 with iodine-125 and technetium-99m was established, the labeled proteins were evaluated in cell assays in vitro, and their biodistribution was compared directly in vivo.
Dosimetry of the I-Plant Model 3500 iodine-125 brachytherapy source.