4 ms·
And those, i think, are just from the fixed magnets (which may be a type of superconducmting electromagnet thats just normally on.). During a scan, dont mangeti
by dedward 15y ago
And those, i think, are just from the fixed magnets (which may be a type of superconducmting electromagnet thats just normally on.). During a scan, dont mangetic fields go way way up? The fixed ones are just there for stability and whatnot.
- po 15y agoThey are superconducting magnets kept that way through cryogenic helium. They can lose their magnetism through a process called quenching. If you search on youtube for "MRI quench" there are several videos of people messing around with MRI's before they get decommissioned. Not exactly safe. http://www.youtube.com/watch?v=5z33ZcDgavY http://www.youtube.com/watch?v=5z33ZcDgavY http://www.youtube.com/watch?v=6BBx8BwLhqg http://www.youtube.com/watch?v=6BBx8BwLhqg There is a lot of helium in there and it can explode: http://www.youtube.com/watch?v=1R7KsfosV-o http://www.youtube.com/watch?v=1R7KsfosV-o