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322 Comments
- thegamingguy, on 12/24/2008, -2/+317Who lets people mess around with a machine that expensive? I ask because I have some "bootleg mythbusters" ideas myself.
- technonoob, on 12/24/2008, -2/+305There's $2,700,000.00 down the drain
- gumby013, on 12/25/2008, -7/+299Note to self:
Remove SCUBA tank before next MRI... - floridiot2, on 12/24/2008, -3/+261Good demonstration as to why you shouldn't carry oxygen tanks into the MRI with you.
- theremixtrack, on 12/25/2008, -4/+251House taught me that those machines are expensive.
- Chompy, on 12/25/2008, -2/+175This. That looks like an ancient GE, plus you can see they're pushing the couch manually; it's either broken or has already had pieces removed. That said, they usually don't get "scrapped"; most of this older stuff goes to the Third World or veterinary hospitals. What probably happened is that the imaging hardware died to the point that it wasn't viable to fix, but the magnet and superconductors still worked for the purpose of the video.
/worked in radiation oncology
//had lots of fun with LINACs
///knows what the inside of his cellphone looks like via X-ray
////delivered exceedingly high fractions to hapless hams and turkeys - LoungeActx, on 12/25/2008, -2/+165I dunno. MRI machines are worth millions of dollars. I don't think this was a training video either...the guy pushed the oxygen tank in with a broomstick.
- thisisparta, on 12/25/2008, -2/+139Achievement unlocked: Break 3 Million dollar machine.
- inactive, on 12/25/2008, -1/+137Perhaps it was an older unit getting decommissioned, and the techs figured they might as well have some fun with it before it got sold as scrap.
- pinguwin, on 12/25/2008, -1/+115I've worked in MRI & high-end mass spectrometers. Both are multi-million dollar machines with 7-8 tesla magnetic fields (approx 150,000x the strength of the Earth). Fillings and braces aren't a big deal but some metal implants might be. You didn't bring your credit cards in the room, lest they be erased. Your mechanical watches could lose 10 minutes an hour as the escapement mechanism would be fighting the magnetic field. They used copper/beryllium tools, which ran several hundreds of dollars for a wrench to work on the machine as they were non-magnetic.
When I worked for a large medical device company that made MRI's, they had a very large lobby. Half the lobby was taken up by a planter of unusual size. The planter was so large because just behind the wall, they had MRI's and the magnetic fields were intruding upon the lobby. Without the planter if someone with an older pacemaker walked through the magnetic field, it could cause mayhem with the pacemaker, so they took care of it by blocking off that part of the lobby with greenery. - tobtoh, on 12/25/2008, -1/+109I did a period of work experience installing MRI machines and it was a fascinating experience. Some of the things I learnt which i thought were pretty cool:
* MRI works by putting you body in the middle of a superconducting magnet and by activating and deactivating the field, they pick up the radio emissions from your body thereby creating an image
* because the MRI is so sensitive to pick up the radio emmissions, the entire room, floor and ceiling are lined with copper (ie it's one huge faradays cage) to block out all external radio emmissions.
* if you had a radio inside the MRI room, as soon as you shut the door, your radio would stop working
* metal workers are not allowed to have MRI because they often have tiny metal splinters in their eyes from their work and the MRI will rip those splinters out.
* the huge casing of the MRI machine is mostly liquid nitrogen to allow the superconducting magnet to function ... so if you ever have an MRI, think about the litres of Liquid nitrogen that is surrounding you whilst you lie in the tunnel.
* even with the MRI deactivated, the magnetic field near the machine is still very powerful. My supervisor did a demonstration where he took a plate of metal and stood it on end near the entrance to the MRI machine. He let go ... and instead of simply crashing onto its side, the plate every so slowly leaned over and gently fell to its side. If you remember your basic physics, a magnetic field will generate an electric current in a moving metal plate such that the current will create a magnetic field of it's own to oppose the motion. - fudicka, on 12/25/2008, -0/+99NEXT: Video of why you shouldn't cover yourself with chum before swimming in shark infested waters.
- OneLess, on 12/25/2008, -0/+86LL Cool Jay taught me that prison tattoos hurt in an MRI machine.
- inactive, on 12/24/2008, -2/+68This would only affect ferromagnetic metals.
- ophello, on 12/25/2008, -7/+73Ok people, time for a basic science lesson some of you are failing: not just any metal will become attracted to an MRI.
Iron, nickel and cobalt are the three that are attracted. This would include steel since steel contains iron and nickel. - NecroSexy, on 12/25/2008, -5/+69Damn, I was off by a penny.
- Leonffs, on 11/20/2009, -1/+64Magnets messing around with metal. Yep looks like Physics is still working guys.
- SeaMowse, on 12/24/2008, -0/+56Fillings don't appear to be a problem. I get MRI's done annually of my head, and I have tons of fillings. Never been an issue.
- travis6690, on 12/25/2008, -21/+76I'MMA CHARGIN MAH MAGNET
- icurnvs, on 12/25/2008, -1/+52The submitter made some comments to the video. The imaging portion of the MRI was broken beforehand, but the magnets still worked. The machine was about to get replaced with a new one.
- lepetitmousse, on 12/25/2008, -2/+51i always wonder who that one person is that burries every informative comment on digg from someone who actually knows what they are talking about. It always seems to happen to anyone who tells a detailed but relevant story about anything.
- blacktriangle, on 12/25/2008, -6/+52With all due respect, a ton of fillings can be the cause of many neurological issues.
- VelvetoneFusion, on 12/25/2008, -1/+47Disreputable Gases?
- yuravian, on 12/24/2008, -0/+42I believe they use a non-magnetic metal or alloy (maybe aluminum based? I dunno.) for anything that you would not be able to remove before an MRI whenever possible. My braces back in high school never even set off metal detectors, and I think I once put a magnet near them to see if they were magnetic (I don't think they were, but I can't remember 100%)
- ophello, on 12/25/2008, -3/+44Iron, nickel and cobalt are the only metals attracted to magnetic fields. Not just any metal. Braces are not made of iron, nickel or cobalt.
- reparsed, on 12/25/2008, -2/+42Aluminum displays some strange behavior in MRI:
http://www.youtube.com/watch?v=fxC-AEC0ROk - LJSeinfeld, on 12/25/2008, -0/+39That's an OLD magnet. I thought it kinda looked like a Siemens Impact...
I get the "opportunity" to work around live magnets sometimes, and sometimes when they're being decommissioned and not resold to "mom & pop" clinics, Third World countries, Veterinarians, etc., They'll let you pitch stuff into the bore. One of my friends was allowed to chuck a claw hammer at the magnet, similar effect.. shot through the back wall and then "rubber-banded" back to isocenter, rattled around a bit and stayed there.
Note that this is also a kind-of reenactment of an actual incident where a ferrous O2 bottle was brought into the room with a patient in the bore... not good, fatal mistake. - Unknown038, on 12/25/2008, -2/+41and unnecessary. its obviously just lupus.
- SheaGK, on 12/25/2008, -0/+39And paramagnetic materials.
- Sherman901, on 12/25/2008, -1/+39i learned something new 3 different times today! thank you
- TheOther1, on 12/25/2008, -0/+37Floor buffer, chair, guns, etc in MRIs:
http://www.simplyphysics.com/flying_objects.html - coheedcollapse, on 12/25/2008, -0/+36I had to get an MRI when I was a little kid and after I had gone through the tube, I asked the technician how powerful the magnet in the device was (I was a intrigued), she brought in a small metal dog leash, slowly let go of one end, and it stretched out completely horizontal in the air. It was almost completely taut. That stuff is ridiculous.
- eeevildictator, on 12/25/2008, -0/+34Noble Gases?
- MostlyHarmless, on 12/25/2008, -0/+33It is extremely rare for any modern implanted device/apparatus to not be MR-compatible. I work with MRI on a daily basis and we're able to scan people with permanent retainers, fillings, and pins in different parts of their body. It's too valuable a diagnostic tool to lose by implanting something that isn't MR-compatible.
Fun fact: when we scan individuals with permanent retainers, it looks like the entire inside of their face is gone - startling at first, but makes sense once you think about the local field distortions that degrade the quality of our measurements. - RobotCitizen, on 12/25/2008, -0/+32Polyamorous materials?
- ophello, on 12/25/2008, -3/+35Iron, nickel and cobalt are the only metals attracted to magnetic fields.
- Gareth321, on 12/25/2008, -0/+30... and another reason why a prince albert is just a bad idea.
- dustinbolton, on 12/25/2008, -1/+31Are you retarded?
- scaaven2, on 12/25/2008, -1/+30Peach?
- , on 12/25/2008, -1/+30You have over 2000 pounds of metal in your teeth?!?!
I think I figured out why you need so many MRI's. - Impressa, on 12/25/2008, -0/+29Diamagnetic materials?
- larryyhi, on 12/25/2008, -0/+28Oh that bitch cried.. and cried.. and cried.
- jamwil87, on 12/25/2008, -1/+29Monomagnetic materials?
- ivansusanin, on 12/25/2008, -0/+27Bear *****?
- sandbird, on 12/25/2008, -0/+27I used to work for a ceiling construction company, and we won a bid to do the work on a new MRI room. You'd be amazed just how many things you have to find non-ferrous versions of to build for something like that. Fasteners that could attach to concrete but aren't made of steel were a particularly fun challenge.
- popstation, on 12/25/2008, -2/+28only scuba Steve would get a MRI with a scuba tank.
- BobTheTaco, on 12/25/2008, -0/+26Trimagnetic materials?
- dtfinch, on 12/25/2008, -0/+25Plasma?
- Popeiler, on 12/25/2008, -1/+25Toadstool?
- wondertwins, on 12/25/2008, -1/+25Thats how much an MRI unit costs? wow...
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