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- Technetium-99m abstract "Technetium-99m is a metastable nuclear isomer of technetium-99 (itself an isotope of technetium), symbolized as 99mTc, that is used in tens of millions of medical diagnostic procedures annually, making it the most commonly used medical radioisotope.Technetium-99m is used as a radioactive tracer and can be detected in the body by medical equipment (gamma cameras). It is well suited to the role because it emits readily detectable 140 keV gamma rays (these 8.8pm photons are about the same wavelength as emitted by conventional X-ray diagnostic equipment) and its half-life for gamma emission is 6.0058 hours (meaning 93.7% of it decays to 99Tc in 24 hours). The "short" physical half-life of the isotope and its biological half-life of 1 day (in terms of human activity and metabolism) allows for scanning procedures which collect data rapidly but keep total patient radiation exposure low. The same characteristics make the isotope suitable only for diagnostic but never therapeutic use.Technetium-99m was discovered as a product of cyclotron bombardment of molybdenum. This procedure produced molybdenum-99, a radionuclide with a longer half-life (2.75 days), which decays to Tc-99m. At present, molybdenum-99 (Mo-99) is used commercially as the easily transportable source of medically used Tc-99m. In turn, this Mo-99 is usually created commercially by fission of highly enriched uranium in aging research and material testing nuclear reactors in several countries.".
- Technetium-99m thumbnail First_technetium-99m_generator_-_1958.jpg?width=300.
- Technetium-99m wikiPageExternalLink catalog.php?record_id=12569.
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- Technetium-99m wikiPageWikiLink Cardiac_stress_test.
- Technetium-99m wikiPageWikiLink Cardiac_ventriculography.
- Technetium-99m wikiPageWikiLink Cardiomyopathy.
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- Technetium-99m wikiPageWikiLink Category:Isotopes_of_technetium.
- Technetium-99m wikiPageWikiLink Category:Medical_physics.
- Technetium-99m wikiPageWikiLink Category:Medicinal_radiochemistry.
- Technetium-99m wikiPageWikiLink Category:Metastable_isotopes.
- Technetium-99m wikiPageWikiLink Category:Radiobiology.
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- Technetium-99m wikiPageWikiLink Category:Radiopharmaceuticals.
- Technetium-99m wikiPageWikiLink Chalk_River_Laboratories.
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- Technetium-99m wikiPageWikiLink Hoechst_AG.