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

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Discussion Overview

The discussion centers around the frequencies used by MRI machines, specifically questioning whether they utilize microwaves and the potential health implications of prolonged exposure to these frequencies.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about the specific frequencies used in MRI machines and whether they are in the microwave range.
  • Another participant provides information indicating that MRI uses radio-frequency (RF) magnetic fields oscillating in the MHz range for image reconstruction.
  • A participant mentions that regulatory bodies like the FDA have guidelines regarding RF power levels and switching rates, suggesting that current consensus indicates minimal risk to patients from MRI exposure.
  • Another post highlights the complexity of Nuclear Magnetic Resonance imaging, referencing its basis in quantum mechanics and its recognition with a Nobel Prize.

Areas of Agreement / Disagreement

Participants express differing levels of understanding and knowledge about MRI technology, with some providing technical details while others focus on the basic inquiry. There is no clear consensus on the health implications of MRI exposure.

Contextual Notes

There are limitations in the discussion regarding the depth of technical details about MRI operation and the specific health risks associated with RF exposure, which remain unresolved.

Who May Find This Useful

Individuals interested in medical imaging technology, health physics, or the intersection of quantum mechanics and medical applications may find this discussion relevant.

KIAaze
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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?
 
Biology news on Phys.org
http://lmgtfy.com/?q=how+do+MRIs+work" :-p
 
Last edited by a moderator:
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
 
Last edited by a moderator:

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