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Rooms built for superconducting MRI equipment should be equipped with pressure relief mechanisms [46] and an exhaust fan, in addition to the required quench pipe. Because a quench results in rapid loss of cryogens from the magnet, recommissioning the magnet is expensive and time-consuming. Spontaneous quenches are uncommon, but a quench also ...
Doctors are warning patients not to wear spandex clothing when coming in for a magnetic resonance imaging (MRI) procedure. Fabrics that use spandex often have metallic threads that could react ...
MRI does not involve X-rays or the use of ionizing radiation, which distinguishes it from computed tomography (CT) and positron emission tomography (PET) scans. MRI is a medical application of nuclear magnetic resonance (NMR) which can also be used for imaging in other NMR applications, such as NMR spectroscopy. [1]
a protective internal shield (usually uranium metal or a tungsten alloy), and a cylinder of radioactive source material ( caesium-137 in the Goiânia incident, but usually cobalt-60 ) The Goiânia accident [ɡojˈjɐniɐ] was a radioactive contamination accident that occurred on September 13, 1987, in Goiânia , Goiás , Brazil, after an ...
It causes almost 10% of intellectual disability of otherwise unknown cause and can result in behavioral problems. [2] Some of the effects are permanent. [2] In severe cases, anemia, seizures, coma, or death may occur. [1] [2] Exposure to lead can occur by contaminated air, water, dust, food, or consumer products. [2]
According to the 1985 CNSNS report, about four thousand people were exposed to cobalt-60 radiation as a result of the incident. [3] It is estimated that almost 80 percent of people received a dose less than 500 mrem (equivalent to 5 m Sv ); 18 percent, between 0.5 and 25 rems (5–25 mSv); and only two percent (about 80 people) received doses ...
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Metal toxicity or metal poisoning is the toxic effect of certain metals in certain forms and doses on life. Some metals are toxic when they form poisonous soluble compounds. Certain metals have no biological role, i.e. are not essential minerals, or are toxic when in a certain form. [ 1 ]