Medical Which frequencies does an MRI machine use? Is it microwaves?

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MRI machines utilize radio-frequency (RF) magnetic fields, oscillating in the MHz range, to gather signal information for image reconstruction. Prolonged exposure to these RF fields is generally considered safe, with regulatory bodies like the FDA providing guidelines to limit RF power levels and switching rates to mitigate any potential risks. The technology behind MRI, known as Nuclear Magnetic Resonance imaging, is complex and rooted in quantum mechanics, highlighting its significance in medical imaging.
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Hi,

Which frequencies does an MRI machine use? Is it microwaves?
Would prolonged exposure to it be damaging to the body?
 
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http://lmgtfy.com/?q=how+do+MRIs+work" :-p
 
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The actual signal information that is used for reconstructing the MRI images comes from radio-frequency (RF) magnetic fields, oscillating millions of times per second (MHz range).

The FDA and other advisory bodies have recommendations for limiting things such as the rate of switching of the RF gradient fields and the RF power levels, but I think the current consensus is that these things do not pose serious risks to the patient as used in MRI.
 
bobze said:
http://lmgtfy.com/?q=how+do+MRIs+work" :-p

That was wonderful.

Nuclear Magnetic Resonance imaging is actually a very advanced concept...it involves quantum mechanics and was worthy of a nobel prize.

Enjoy the reading
 
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Popular article referring to the BA.2 variant: Popular article: (many words, little data) https://www.cnn.com/2022/02/17/health/ba-2-covid-severity/index.html Preprint article referring to the BA.2 variant: Preprint article: (At 52 pages, too many words!) https://www.biorxiv.org/content/10.1101/2022.02.14.480335v1.full.pdf [edited 1hr. after posting: Added preprint Abstract] Cheers, Tom

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