Also found in: Dictionary, Thesaurus, Financial, Acronyms, Encyclopedia, Wikipedia.
Related to technetium: technetium 99m


a chemical element, atomic number 43, atomic weight 99, symbol Tc. (See Appendix 6.)
technetium 99m the most frequently used radioisotope in nuclear medicine, a gamma emitter having a half-life of 6.01 hours.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

tech·ne·ti·um (Tc),

An artificial radioactive element, atomic no. 43, atomic wt. 99, produced in 1937 by bombardment of molybdenum by deuterons; also a product of the fission of 235U; used extensively as a radiographic tracer in imaging studies of internal organs.
[G. technetos, artificial]
Farlex Partner Medical Dictionary © Farlex 2012


(Tc) (tek-nē'shē-ŭm)
A radioisotope of technetium that decays by isomeric transition, emitting an essentially monoenergetic gamma ray of 142 keV with a half-life of 6.01 hr. It is usually obtained from a radionuclide generator of molybdenum 99 and is used to prepare radiopharmaceuticals for scanning the brain, parotid, thyroid, lungs, blood pool, liver, heart, spleen kidney, lacrimal drainage apparatus, bone, and bone marrow.
[G. technetos, artificial]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


An artificial radioactive element that can be incorporated into various molecules for use in RADIONUCLIDE SCANNING.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005


A radioactive isotope frequently used in radionuclide scanning of the heart and other organs. It is produced during nuclear fission reactions.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
To do this we have developed a technology base which includes new technetium chelates based on amino acids and polypeptides which act as targeting agents to specific disease processes such as differentiating sterile inflammation from infectious inflammation caused by distinct bacteria such as S.
Radioactive technetium was one of the byproducts of irradiating uranium fuel to produce plutonium for the nation's nuclear weapons program.
Last month the Government asked British Nuclear Fuels to impose a nine-month ban on emissions of low-level Technetium from Sellafield.
Both UNLV projects involve the radioactive element technetium, a common product from nuclear fission.
Minimally invasive parathyroidectomy can be 98% successful when a technetium sestamibi scan is used together with ultrasound to localize parathyroid adenomas and a quick parathyroid hormone assay is used during surgery to detect if the proper gland or glands have been removed.
A kidney, ureter, and bladder examination revealed pelvic calcification, and a technetium 99m (Tc 99m) sestamibi scan showed persistent activity bilaterally in the region of the inferior poles of the thyroid gland (figure 1).
United States-based Navidea Biopharmaceuticals' Supplemental New Drug Application for the expanded use of Lymphoseek (technetium Tc 99m tilmanocept) Injection, indicated for guiding sentinel lymph node biopsy in head and neck cancer patients with squamous cell carcinoma of the oral cavity, has received approval from the United States Food and Drug Administration, it was reported yesterday.
A bone marrow biopsy, chest x-ray, total-body skeletal survey, and 99m technetium scintigraphy did not detect any systemic lesion.
Navidea Biopharmaceuticals, a company focused on the development and commercialisation of diagnostic and radiopharmaceutical imaging agents for cancer and other diseases, has introduced its Lymphoseek (technetium Tc 99m tilmanocept) Injection in the United States, it was reported on Friday.
At that time, a thorough evaluation--including a whole-body technetium 99-MDP bone scan and CT of the brain, chest, abdomen, and pelvis--failed to reveal any evidence of metastatic disease.