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How dangerous are magnetic items near an MRI magnet?

practiCal fMRI · demo · Watch on YouTube

Everyday physics & science demosMedicine & infectious disease

What it is

A three-minute demonstration with a decommissioned 4 tesla MRI magnet showing how magnetic objects are pulled in and oscillate along the bore. It illustrates the safety hazards of ferromagnetic items near MRI scanners.

Why Hacker News recommends it

Linked in threads on magnets and implants as a vivid demonstration of how violent MRI magnet forces are.

  • 1 people recommended it
  • 1 different months
  • 0 strong recommendations
  • first 2011, last 2023

What HN commenters said

  1. “Watch this video to see the forces involved”

    Demonstrates the forces involved with MRI magnets

    Shinkei, 2013-10 · Recommendation · in “Towards an inexpensive open-source desktop CT scanner”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: mri, magnetism, safety, ferromagnetism, physics demo

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