technetium 99m


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technetium

 [tek-ne´she-um]
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.

tech·ne·ti·um 99m (99mTc),

(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 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.
References in periodicals archive ?
We are beholden to producers all over the world to maintain a supply of molybdenum 99 for technetium 99m generators.
Technetium 99m based myocardial perfusion imaging predicts clinical outcome in the community outpatient setting: The nuclear utility in the community ('NUC') study.
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).
This antibody is labelled with technetium 99m, a safe low cost radioisotope.