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.
2, 3) When these initial studies are negative, further investigation includes scintigraphy with labeled red blood cells (RBCs), arteriography, technetium 99m pertechnetate (Meckel's) scan, enteroclysis, and/or small bowel enteroscopy.
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.