technetium

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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 (Tc),

(tek-nē'shē-ŭm),
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]

technetium

/tech·ne·ti·um/ (tek-ne´she-um) chemical element, at. no. 43, symbol Tc.
technetium 99m  the most frequently used radioisotope in nuclear medicine, a gamma emitter (0.141 MeV) having a half-life of 6.01 hours.

technetium (Tc)

Etymology: Gk, technectos, artificial
a radioactive, metallic element. Its atomic number is 43, and its atomic mass is 99. The first synthetic element, technetium also occurs in nature. Isotopes of technetium are used in radioisotope scanning procedures of internal organs such as the liver and spleen.

tech·ne·ti·um

(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]

technetium

An artificial radioactive element that can be incorporated into various molecules for use in RADIONUCLIDE SCANNING.

Technetium

A radioactive isotope frequently used in radionuclide scanning of the heart and other organs. It is produced during nuclear fission reactions.

technetium

a chemical element, atomic number 43, atomic weight 99, symbol Tc. See Table 6.

technetium-99m
the most frequently used radioisotope in nuclear medicine, a gamma emitter having a half-life of 6.04 hours and a primary photon energy of 140 keV; symbol 99mTc.
99m
Tc sulfur coated scintiscan see scintiscan.
References in periodicals archive ?
Lot 8 (cold kit for 99m Tc labeling hepatic perfusion (5 dose per kit)) None.
Lot 10 (cold kit for 99m Tc labeling PYP (5 dose per kit)) None.
Lot 11 (cold kit for 99m Tc labeling inflammation (5 dose per kit)) None.
WARNINGS: Radiation risks associated with the use of Sodium Pertechnetate Tc 99m Injection are greater in children than in adults and, in general, the younger the child, the greater the risk owing to greater absorbed radiation doses and longer life expectancy.
PRECAUTIONS: Since the eluate does not contain an antimicrobial agent, it should not be used after 12 hours from the time of TECHNELITE[R], Technetium Tc 99m Generator elution.
Lantheus imaging products include the echocardiography contrast agent DEFINITY([R]) Vial for (Perflutren Lipid Microsphere) Injectable Suspension, an ultrasound contrast agent for use in patients with suboptimal echocardiograms to opacify the left ventricular chamber and to improve the delineation of the left ventricular endocardial border, TechneLite([R]) (Technetium Tc 99m Generator), Cardiolite([R]) (Kit for the Preparation of Technetium Tc 99m Sestamibi for Injection), and Thallium 201 (Thallous Chloride Tl 201 Injection).
Lot No 11 - Kit for the preparation of 99m Tc-DTPA;
Lot No 13 - Kit for the preparation of 99m Tc-HMPAO;
Lot No 14 - Kit for the preparation of 99m Tc-somatostatin analogue;