4 ms·

Oh good, they noticed the effect too. It's almost as if many people experience the effect, but somehow to you it's impossible for any humans to be able to take

Oh good, they noticed the effect too. It's almost as if many people experience the effect, but somehow to you it's impossible for any humans to be able to take advantage of the effect at lower field strengths. When you walk up to the machine it's not turned on. Then non-participants go to the small enclosed control room and then the magnet is activated. Every time you respond you reveal how little you know about MRI and weaken your case. You should stop while you are behind. Also, you should lookup faraday cage. They're like magic to someone who has never heard of them, and they're used in MRI control rooms. I feel sorry for your apparent inability to accept you might be ignorant about anything. I hope you grow out of it one day. Enjoy your weekend, I won't be responding again.

Retric 2y ago
> When you walk up to the machine it's not turned on. False. MRI: https://mriquestions.com/is-field-ever-turned-off.html https://mriquestions.com/is-field-ever-turned-off.html Permanent magnet scanners are permanently "on" by definition. Resistive electromagnet scanners, in theory, can be turned on and off. However, it may take 30-60 minutes for their magnetic fields to stabilize after being off and hence they are generally left continuously on during daily operations. To save electricity, they are usually turned off or have their power levels reduced after hours. Superconducting scanners remain on at all times as long as superconducting temperatures are maintained. The main field may be ramped down for servicing in a controlled manner with minimal loss of cryogens in about 30 minutes and restored in a few hours, but this is performed only occasionally. In the event of an emergency, all superconducting scanners have a "quench" button that releases liquid helium into the atmosphere and turns their fields off within a few seconds. Dumping that helium is inherently expensive and only done in a serious emergency. “Faraday cages cannot block stable or slowly varying magnetic fields, such as the Earth's magnetic field (a compass will still work inside one).” https://en.wikipedia.org/wiki/Faraday_cage https://en.wikipedia.org/wiki/Faraday_cage > then the magnet is activated A magnet not THE primary one. Here’s a reasonable though simplified explanation of why there’s multiple magnets involved: https://www.youtube.com/watch?v=NlYXqRG7lus https://www.youtube.com/watch?v=NlYXqRG7lus Anyway, it’s clear you have many fundamental misunderstandings so I can see how you’d come to such wildly inaccurate conclusions. > it's impossible for any humans to be able to take advantage of the effect at lower field strengths. The actual literature investigating the effect describes why it doesn’t work on earths magnetic field.
- daveguy 2y ago
  Someone who does not know that MRI has variable field strength is someone who truly does not know the basics of MRI. Maybe this source will clue you in as to why your understanding of MRI is fundamentally flawed: https://pmc.ncbi.nlm.nih.gov/articles/PMC4632105/ https://pmc.ncbi.nlm.nih.gov/articles/PMC4632105/ Good luck buddy.
  - Retric 2y ago
    I’m aware, which is why I’ve said repeatedly there’s multiple magnets involved one vastly weaker than the other which is kept on… But wallow in your ignorance, it brings a little dark joy knowing I am simply better than you in a real tangible way. You’re unable to erase signs of your failure, and as long as HN lasts anyone can know my dominance.
    - daveguy 2y ago
      Hahaha. Thank you for the laugh. It must be great walking around with such an unwavering sense of superiority. Enjoy the dark joy of your perceived vast superiority and try not to have a breakdown when you come crashing back to reality. May you never crash and forever be certain in your vast delusions of superiority all the rest of your days. Very rarely have I seen a more foolish certainty. Congratulations.
      - Retric 2y ago
        You could join on the dark side. All it takes is learning how the fundamental forces of the universe work. Ok, in this context having a friend who works in medical imaging was useful, but that’s just a trivial matter.

Retric 2y ago

> When you walk up to the machine it's not turned on. False. MRI: https://mriquestions.com/is-field-ever-turned-off.html https://mriquestions.com/is-field-ever-turned-off.html Permanent magnet scanners are permanently "on" by definition. Resistive electromagnet scanners, in theory, can be turned on and off. However, it may take 30-60 minutes for their magnetic fields to stabilize after being off and hence they are generally left continuously on during daily operations. To save electricity, they are usually turned off or have their power levels reduced after hours. Superconducting scanners remain on at all times as long as superconducting temperatures are maintained. The main field may be ramped down for servicing in a controlled manner with minimal loss of cryogens in about 30 minutes and restored in a few hours, but this is performed only occasionally. In the event of an emergency, all superconducting scanners have a "quench" button that releases liquid helium into the atmosphere and turns their fields off within a few seconds. Dumping that helium is inherently expensive and only done in a serious emergency. “Faraday cages cannot block stable or slowly varying magnetic fields, such as the Earth's magnetic field (a compass will still work inside one).” https://en.wikipedia.org/wiki/Faraday_cage https://en.wikipedia.org/wiki/Faraday_cage > then the magnet is activated A magnet not THE primary one. Here’s a reasonable though simplified explanation of why there’s multiple magnets involved: https://www.youtube.com/watch?v=NlYXqRG7lus https://www.youtube.com/watch?v=NlYXqRG7lus Anyway, it’s clear you have many fundamental misunderstandings so I can see how you’d come to such wildly inaccurate conclusions. > it's impossible for any humans to be able to take advantage of the effect at lower field strengths. The actual literature investigating the effect describes why it doesn’t work on earths magnetic field.

daveguy 2y ago
Someone who does not know that MRI has variable field strength is someone who truly does not know the basics of MRI. Maybe this source will clue you in as to why your understanding of MRI is fundamentally flawed: https://pmc.ncbi.nlm.nih.gov/articles/PMC4632105/ https://pmc.ncbi.nlm.nih.gov/articles/PMC4632105/ Good luck buddy.
- Retric 2y ago
  I’m aware, which is why I’ve said repeatedly there’s multiple magnets involved one vastly weaker than the other which is kept on… But wallow in your ignorance, it brings a little dark joy knowing I am simply better than you in a real tangible way. You’re unable to erase signs of your failure, and as long as HN lasts anyone can know my dominance.
  - daveguy 2y ago
    Hahaha. Thank you for the laugh. It must be great walking around with such an unwavering sense of superiority. Enjoy the dark joy of your perceived vast superiority and try not to have a breakdown when you come crashing back to reality. May you never crash and forever be certain in your vast delusions of superiority all the rest of your days. Very rarely have I seen a more foolish certainty. Congratulations.
    - Retric 2y ago
      You could join on the dark side. All it takes is learning how the fundamental forces of the universe work. Ok, in this context having a friend who works in medical imaging was useful, but that’s just a trivial matter.