I got to take apart an MRI-safe(ish¹) video projector recently. Turns out it was just a regular DLP projector in an RF shielding box, but all the screws and components on the outside (anything that could be removed) were either plastic, non-magnetic stainless steel, or aluminum. They even converted the stock remote control to be powered with a cable instead of a AA battery (most batteries have steel cases).
They replaced the lens with a very long throw one so the projector could be located far away and bolted to the wall. It still had some steel components inside, but the manual made it very clear you were not supposed to open the case while in the same room with the magnet. No other manual I've read has warnings that trying to change a light bulb could kill you.
¹it was designed to be used within the same room as the MRI, but not to go into the magnet bore itself. You were supposed to securely mount it at a distance where the field strength was less than 100 gauss. Since it still contained steel, there were still warnings all over that "this device may become a projectile" if you got too close to the magnet. Installation must have been a bit nerve wracking!
>Installation must have been a bit nerve wracking!
They almost certainly just selected a drywall anchor based on the rating advertised on the package and sent it without any more thought, their ass was covered.
Big picture people who take a step back think about what they're doing don't tend to find themselves installing projectors in hospitals, or if they do they aren't there very long.
> Big picture people who take a step back think about what they're doing don't tend to find themselves installing projectors in hospitals, or if they do they aren't there very long.
They're installed for fMRI research, to show stimuli to study participants.
My point was that a maintenance guy who without prompting thinks to himself "hmm, drywall anchors are rated for vertical loading, not horizontal, let's find a (invariably metal, because office) stud and toggle bolt that bitch" is shortly onto bigger better things.
Likely true. For all the warnings the thing had about "securing" it, it did not have very many mount points or threaded holes to do so, just some rubber feet. Probably was just sat on a shelf and tied off with a nylon strap. I suppose you aren't going to casually walk past the magnet with a bulky projector like this as you would do with a screwdriver you forgot in your pocket.
They replaced the lens with a very long throw one so the projector could be located far away and bolted to the wall. It still had some steel components inside, but the manual made it very clear you were not supposed to open the case while in the same room with the magnet. No other manual I've read has warnings that trying to change a light bulb could kill you.
¹it was designed to be used within the same room as the MRI, but not to go into the magnet bore itself. You were supposed to securely mount it at a distance where the field strength was less than 100 gauss. Since it still contained steel, there were still warnings all over that "this device may become a projectile" if you got too close to the magnet. Installation must have been a bit nerve wracking!