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If you're talking about superconducting magnets, because the boiling point of argon is way too high.
If you're talking about electromagnets (I don't know that any MRI instruments actually use electromagnets, but quite a few research NMR instruments, which use the same principle, do), then it's because argon, as a monatomic gas, has a low heat capacity. The usual coolant for an electromagnet in an NMR spectrometer is the much cheaper and more readily available water, which is both a darn good coolant in its own right, and can be readily re-cooled for another pass through the coils with a swamp cooler.
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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
What types of magnets are used in a MRI machine?
Electromagnets
What element cools mri magnets?
liquid helium
Is it possible to have a MRI body scan with a defibrillator fitted?
no it is not possible to have an MRI scan because the dfibrillator is dirupted by magnets and that is what an MRI is, a giant magnet.
How was science used in creating the MRI?
MRI stands for Magnetic Resonance Imaging therefor magnets are in use of science.
How do you demagnetize a credit card?
if you are an mri tech whis the mri machine uses big magnets to see images it can demagnitize a credit card.
What uses powerful magnets to examine soft tissue and structure in the brain?
Mri scan
What are the uses of magnets?
They are used for: Roller coasters, MRI scans, trains,refrigerators and etc.
CAN YOU HAVE A MRI WITH A COCHLEAR IMPLANT?
Cochlear implants have magnets in them which interfere with the MRI process. The magnet from the implant will require removal before the MRI exam, but can be replaced after the scan. There are cochlear implants nowadays which can undergo medical procedures such as MRI's without removing anything.
Does an MRI create images by combining high-frequency ultrasonic waves and strong magnets?
Yes
What are 2 jobs that use magnets?
MRI Scanners that are used in the hospital i guess a medical technician
Are protons magnets?
If you are studying NMR spectroscopy or MRI you can essentially view protons as little magnets that will line up along an external field.
