The half-life of ~(99m)Tc in various chemical conditions has been measured precisely. The ~(99m)Tc was produced by the reaction of ~(100)Mo(γ, n)~(99)Mo, followed by disintegration to ~(99m)Tc. The half-life of ~(99m)Tc was determined within the good precision of the ...
The rate constant ( α 2 ) of the terminal exponential of the technetium-99m diethylene triamine pentaacetic acid (DTPA) plasma clearance curve is close t... JL Holness,JS Fleming,A Malaroda,... 被引量: 4发表: 2013年 (99m)Tc-DTPA volume of distribution, half-life and glomerular filtra...
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...
Half-life has a profound effect on the specific activity. The shorter the half-life, the higher the specific activity. As a short-lived radionuclide undergoes the process of radioactive decay, atoms of the radionuclide in question emit radioactivity (alpha particles, beta particles, etc.) frequen...
This is followed by treadmill exercise, another injection of Cardiolite during peak exercise, and then another image obtained with the camera indicating maximum blood flow. After the test, I decided to determine the biological half-life of Cardiolite. 展开 ...
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 h) and pure gamma...
Joseph E.Tomaszewski, ...Karen M.Schweikart, inAnticancer Drug Development, 2002 5.Predictability of Preclinical Animal Models The humanelimination half-lifeis similar to that observed in dogs and baboons (Table 10), but smaller than might be predicted from the relationship depicted inFig. 7. AU...
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...
Here, the positron-emitters 94m Tc, 120,124 I, 66,68 In, 66,68 Ga and 61,64 Cu could be used as the PET imaging analogues. The abundance of inorganic positron-emitting radionuclides span a wide range of half-lives ( 1–100 hours) and spectrum of chemical properties ranging from the...
“long-lived” if they have half-lives of a couple of hours. In order to be able to make a reasonable pre-selection of isotopes that could be included in the current work, we have consulted existing half-life data reported by the Nuclear Data Sheets (NDS) for isotopes withT1/2> 1 ...