• decay
  • It decays by isomeric transition to technetium-99, a desirable characteristic, since the very long half-life and type of decay of technetium-99 imposes little further radiation burden on the body. (wikipedia.org)
  • This transmutation process bombards the technetium ( 99 Tc as a metal target) with neutrons , forming the short-lived 100 Tc (half-life = 16 seconds) which decays by beta decay to stable ruthenium ( 100 Ru). (wikipedia.org)
  • 99Mo has a half-life of 66 hours and can be easily transported over long distances to hospitals where its decay product technetium-99m (with a half-life of only 6 hours, inconvenient for transport) is extracted and used for a variety of nuclear medicine diagnostic procedures, where its short half-life is very useful. (wikipedia.org)
  • The Fleming-Harrington Redistribution Wash-in Washout (FHRWW) or redistribution rate for such individuals without heart disease was approximately 15-20%, with half of this (10%) the result of technetium-99m decay over 55 minutes. (wikipedia.org)
  • 1952
  • In 1952, astronomer Paul W. Merrill in California detected the spectral signature of technetium (specifically wavelengths of 403.1 nm, 423.8 nm, 426.2 nm, and 429.7 nm) in light from S-type red giants. (wikipedia.org)
  • Therefore, the detection in 1952 of technetium in stellar spectra provided unambiguous proof of nucleosynthesis in stars, one of the more extreme cases being R Geminorum. (wikipedia.org)
  • injection
  • Technetium Tc 99m tilmanocept injection is used to find lymph node in patients with solid tumors. (mayoclinic.org)
  • Planar scintigraphy was used to measure the activity of technetium-99m-labeled liposomes within the tumor at predetermined times up to 18 h after injection. (aacrjournals.org)
  • spectra
  • Current research indicate that the presence of technetium in AGB stars occurs after some evolution, and that a significant number of these stars do not exhibit the metal in their spectra. (wikipedia.org)
  • diagnostic
  • Growing research and development activities for raising the diagnostic standards in the country is anticipated to errand the technetium-99m market growth over the forecast period. (transparencymarketresearch.com)
  • These factors are expected to result in increased demand for medical devices and diagnostic equipment in the near future, thus increasing need for imaging procedures, and ultimately driving demand for technetium-99m. (transparencymarketresearch.com)
  • half-life
  • The long half-life of technetium-99 and its ability to form an anionic species make it (along with 129 I ) a major concern when considering long-term disposal of high-level radioactive waste. (wikipedia.org)
  • Technetium-99m's short half-life of 6 hours makes storage impossible and would make transport very expensive. (wikipedia.org)
  • generator
  • Based on the similarities between the chemistry of the tellurium-iodine parent-daughter pair, Tucker and Greene developed the first technetium-99m generator in 1958 (see photo of this generator at the beginning of the article). (wikipedia.org)
  • metal
  • Technetium hexafluoride is prepared by heating technetium metal with an excess of F2 at 400 °C. Tc + 3 F 2 → TcF 6 Technetium hexafluoride is a golden-yellow solid at room temperature. (wikipedia.org)
  • It is volatile at elevated temperatures and its volatility has been used for separating technetium from other metal chlorides. (wikipedia.org)
  • Technetium tetrachloride can be synthesized from the reaction of Cl2(g) with technetium metal at elevated temperatures between 300-500 °C: Tc + 2 Cl2 → TcCl4 Technetium tetrachloride has also been prepared from the reaction of ditechnetium heptoxide with carbon tetrachloride in a bomb reaction vessel at elevated temperature and pressure: Tc2O7 + 7 CCl4 → 2 TcCl4 + 7 COCl2 + 3 Cl2 At 450 °C under vacuum, TcCl4 decomposes to TcCl3 and TcCl2. (wikipedia.org)
  • Nearly
  • Nearly all technetium is produced synthetically, and only about 18000 tons can be found at any given time in the Earth's crust. (wikipedia.org)
  • Utility
  • Clinical utility of external immunoscintigraphy with the IMMU-4 technetium-99m Fab' antibody fragment in patients undergoing surgery for carcinoma of the colon and rectum: results of a pivotal, phase III trial. (wikipedia.org)
  • research
  • For this reason, the environmental chemistry of technetium is an active area of research. (wikipedia.org)
  • The top drawer players operating in the technetium-99m market in the Middle East and Africa are striving to diversify their approach in terms of technological development, states Transparency Market Research (TMR) in a research report. (transparencymarketresearch.com)
  • Imaging
  • With reference to the past and the probable future shortage of technetium-99m, it has been expected that there can be a shift from SPECT to PET or other alternate imaging modalities in the future. (transparencymarketresearch.com)
  • Etarfolatide consists of a small molecule targeting the folate receptor and an imaging agent, which is based on technetium-99m. (wikipedia.org)
  • companies
  • The foremost companies operating in the Middle East and Africa technetium-99m market are General Electric Company, Siemens Healthineers, Sumitomo Heavy Industries, Ltd., Advanced Cyclotron Systems, Inc., and IBA. (transparencymarketresearch.com)
  • Name
  • Exametazime (the part without technetium) is sometimes referred to by its chemical name of hexamethylpropyleneamine oxime or HMPAO. (wikipedia.org)
  • medical
  • Technetium-99m is used as a radioactive tracer and can be detected in the body by medical equipment (gamma cameras). (wikipedia.org)
  • Tc-99m remained a scientific curiosity until the 1950s when Powell Richards realized the potential of technetium-99m as a medical radiotracer and promoted its use among the medical community. (wikipedia.org)
  • It was not until 1960 that Richards became the first to suggest the idea of using technetium as a medical tracer. (wikipedia.org)
  • Market
  • We provide independent and unbiased information on manufacturers, prices, production news and consumers for the global and regional (North America, Asia and Europe) market of Technetium. (reportsnreports.com)
  • According to a TMR researcher, "The technetium-99m market in the Middles East and Africa is likely to be pegged at a valuation of US$636.1 mn by the end of 2026 from a valuation of US$273.3 mn in 2015. (transparencymarketresearch.com)