MRI Safety for Non-MRI Workers

MRI Safety for Non-MRI Workers


if you’ve been asked to watch this short
video it’s because you work near a Magnetic resonance imaging scanner. So
even if your job is not directly related to the imaging process, you need to know
how to keep yourself safe. Let’s start by understanding what you’re dealing with.
Magnetic Resonance Imaging, or MRI, i s thetechnique for creating detailed images of the human body The machine uses powerful magnets to
align the nuclei of atoms inside the body, and a variable magnetic field that
causes the atoms to resonate, a phenomenon called nuclear magnetic
resonance. The nuclei produced their own rotating magnetic field that a scanner
detects and uses to create an imag. The most important thing for you to know is that magnets inside the MRI scanner are always on. They are never turned off, even
when the scanner is not being used. MRI magnets are really really powerful. In
fact they are 30,000 times more powerful than the earth’s magnetic field. If an MRI
scanner were as big at the earth, any orbiting satellites would come crashing
back to earth. Well, not exactly, but you get the picture. MRI is divided into four zones. Zone 1 is outside the MRI area and is freely accessible to everybody. Zone 2 is restricted to hospital workers
and MRI patients who are under the direct supervision of MRI workers. This is where
patients are screened to ensure they remove all magnetic objects from their
person, apart from medical devices such as pacemakers and cochlear implants,
which are definite no-no’s. Patients are also asked to leave personal items such
as watches, rings, necklaces, earrings and any piercings in a locker. Zone 3 is restricted to MRI workers and the patients they’re supervising. Finally, Zone 4 is the scanner room itself. This is where the magnet is most powerful. Only MRI workers and patients should be in this area. Non-MRI workers, such as maintenance or cleaners must be pre-screened before they can enter Zone 4. They must sign a form and undergo an interview to recognize the risks associated with
working in the MRI area. They are also under the direct supervision of an MRI
worker when they are in Zone 4. Big warning signs are posted on the door of the scanner room to remind workers about the magnets. Non-MRI workers must remember that they may have phones, keys or other magnetic objects in their pockets. They may also be carrying tools to complete a job. These tools must be approved before entering Zone 4. Just enjoy the next few moments as we show you what can happen if workers don’t heed the warning signs. At this point it’s pretty obvious. Do not bring anything magnetic inside the scanner room. Ever. If you remember nothing else from this video, remember two things: First: magnets inside the MRI
scanner are always on. And secondly: pay attention to the warning signs telling you that magnets inside the
MRI scanner are always on.

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