Search results
Results from the WOW.Com Content Network
Radionuclide therapy (RNT, ... An yttrium-90 (90 Y) colloidal suspension is used for radiosynovectomy in the knee joint. [16] Liver tumours. Yttrium-90 spheres
Yttrium-90 is produced by the nuclear decay of strontium-90 which has a half-life of nearly 29 years and is a fission product of uranium used in nuclear reactors. As the strontium-90 decays, chemical high-purity separation is used to isolate the yttrium-90 before precipitation.
Naturally occurring strontium is nonradioactive and nontoxic at levels normally found in the environment, but 90 Sr is a radiation hazard. [4] 90 Sr undergoes β − decay with a half-life of 28.79 years and a decay energy of 0.546 MeV distributed to an electron, an antineutrino, and the yttrium isotope 90 Y, which in turn undergoes β − decay with a half-life of 64 hours and a decay energy ...
A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is a nuclide that has excess numbers of either neutrons or protons, ... Strontium-90: 38: 52:
The radionuclide delivers the actual therapeutic effect (or emission, such as photons, for imaging). The chelator is the essential link between the radionuclide and peptide. For 177 Lu and 90 Y this is typically DOTA (tetracarboxylic acid, and its variants) and DTPA (pentetic acid) for 111 In. [7]
These use heat produced by radioactive decay of strontium-90 to generate heat, which can be converted to electricity using a thermocouple. Strontium-90 has a shorter half-life, produces less power, and requires more shielding than plutonium-238 , but is cheaper as it is a fission product and is present in a high concentration in nuclear waste ...
There are currently three types of commercially available microsphere for SIRT. Two of these use the radionuclide yttrium-90 (90 Y) and are made of either glass (TheraSphere) or resin (SIR-Spheres). The third type uses holmium-166 (166 Ho) and is made of poly(l-lactic acid), PLLA, (QuiremSpheres).
The list then covers the ~700 radionuclides with half-lives longer than 1 hour, split into two tables, half-lives greater than one day and less than one day. Over 60 nuclides that have half-lives too short to be primordial can be detected in nature as a result of later production by natural processes, mostly in trace amounts.