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The "body scanners" that use it are Magnetic Resonance Imaging, or MRI, machines. (The scanners at airports are akin to radar sets, and don't use liquid helium.) MRI machines contain a very large electromagnet. To keep the thing from requiring its own power plant, an MRI magnet is wound with superconducting wire - wire with, effectively, no resistance. Superconducting wire must be kept at the temperature of liquid helium if you want it to superconduct.
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Why do MRI scanners use helium?
Liquid helium is used to cool the superconducting electromagnets.
What is the main purpose of helium?
helium is used to cool superconducting magnets in mri scanners as helium is lighter then air airships use them as gasses
How is helium used in the body?
Helium is a gas and is not found in the body
What element is used to freeze things?
Oxygen (I) Hydrogen and Helium are elements that are used to freeze things. Liquid helium is used to get things extremely cold.
How is neon use?
Neon is used to make neon signs. Neon and helium are used to make gas lasers. Neon is used in lightning arrestors, television tubes, high-voltage indicators, and wave meter tubes. Liquid neon is used as a cryogenic refrigerant, as it has over 40 times the refrigerating capacity per unit volume than liquid helium and over three times that of liquid hydrogen.
Is americium used in bar code scanners?
Americium is not used in bar code scanners.
Do people use helium to lift off rockets?
No. Helium is one of the lightest elements in the world and is not commonly used in any form of transportation. To answer your question the compound used to lift rockets is liquid oxygen.
Can liquid argon be used in cryogenics?
Liquid argon could in theory be used for cryogenics, but it has a similar temperature range to liquid nitrogen, which is tremendously cheaper and more abundant than argon. For the lower temperature ranges, you would use liquid helium.
Is there a more common coolant besides liquid nitrogen to cool below 75K?
Helium is used but it is more expensive.
How is lutetium used?
Lutetium is used in PET scanners
What type of energy is used with full body scanners in the aiport?
Those are "millimeter waves" ... radio waves in the general neighborhood of 300 GHz.
What material is used to cool Jefferson Lab's electron accelerator to near absolute zero?
Liquid helium is used to cool Jefferson Lab's accelerator components.
