technetium 99m

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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 99m (99mTc),

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 hours. 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.
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References in periodicals archive ?
The facility is responsible for supplying more than half of the molybdenum 99 for technetium 99m generation in North America.
The study was presented in a poster at the meeting, and included 302 patients referred for clinically indicated rest-stress myocardial perfusion imaging (MPI) with technetium 99m sestamibi.
(25) Radionuclide examination with technetium 99m detected bone involvement in six of these patients.
Technetium 99m based myocardial perfusion imaging predicts clinical outcome in the community outpatient setting: The nuclear utility in the community ('NUC') study.