technetium 99The half-life and specific activity of 99Tc were redetermined by measuring the activity of a known weight (determined coulometrically) of 99Tc by a liquid scintillation method and found to be 2·14(±0.·05) × 10 5 years and 3·75(±0·11) × 10 4 disintegration/min per...
The biological half-life of Tc (Tsub(p)sup(1/2) 60.6 d) has been investigated since it is not possible to investigate the biological fate of the bone-imaging Tc-complexes whose physical half-life is only 6 hr. The biological elimination curve after intravenous injection of Tc into a smal...
phys·i·cal half-life the time required for half the atoms of a radionuclide to undergo disintegration. Farlex Partner Medical Dictionary © Farlex 2012Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun cont...
The test involves the patient receiving an injection of Cardiolite, a substance containing a molecule to which Technetium-99m (Tc-99m)1 is attached, and then lying under a camera that detects gamma rays emanating from the interior heart wall and forms an image indicative of blood flow in ...
The metastable form of Technetium-99 (Tc-99m) and Iodine-131 (I-131), both used in nuclear medicine procedures, have half-lives of only six (6) hours and eight (8) days, respectively. Tritium (Hydrogen-3 or H-3), a radioactive isotope of hydrogen and one that is produced both nat...
Technetium generator Technetium-99m is used in 90% of radionuclide imaging, as it fulfils most of the above criteria. With its gamma energy of 140 keV, it is easily collimated and easily absorbed in a fairly thin crystal, thus giving good spatial resolution. With its short half-life (6 ...
If the activity ratioA(Mo)/A(Tc)is smaller than about10−6at the beginning of the measurement, the activity of99Mo has no influence on the determination the half-lifeof99mTc. Unfortunately, the amount of99Mo in the count-ing sample was not determined exactly because it was toosmall to...
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The half-life of a radioactive element is the time that it takes for one half of the atoms of that substance to disintegrate into another nuclear form. These can range from mere fractions of a second, to many billions of years. In addition, the half-life of a particular radionuclide is...
Before the widespread application of technetium-99m in nuclear medicine, the radioactive isotope thallium-201, with a half-life of 73 hours, was the main substance for nuclear cardiography. 在核醫學廣泛使用鎝-99m之前,半衰期為73小時的鉈-201曾經是核心動描記所使用的主要放射性同位素。 WikiMatrix...