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 ?
Technetium Tc 99m human serum albumin and technetium Tc 99m sulfur colloid.
In children, Tc 99m HMPAO is preferred over other scintigraphic techniques because its overall radiation dose is lower.
Among adult patients, the sensitivity of Tc 99m radiopharmaceuticals in detecting acute osteomyelitis exceeds 90%.
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).
Electrocardiographic (ECG) gated acquisition of Tc 99m sestamibi single photon emission computed tomography (SPECT) offers the potential for simultaneous assessment of myocardial perfusion and function.
A 1994 study by Udelson et al[8] using Tl 201 SPECT and Tc 99m sestamibi SPECT imaging found similar sensitivities for detection of CAD in both men and women.
Lot 4 (cold kit for 99m Tc labeling bone scintigraphy (5 dose per kit)) None.
Lot 5 (cold kit for 99m Tc labeling lung perfusion (5 dose per kit)) None.
Lot No 10 - Kit for the preparation of 99m Tc-colloid;
Lot No 11 - Kit for the preparation of 99m Tc-DTPA;
The DRAXIMAGE MAA Kit is a lyophilized formulation of aggregated albumin that is labelled with the short-lived medical isotope Technetium Tc 99m by qualified radiopharmacists immediately before injection.