The first thing you check before an MRI is if the person has shrapnal or a metal valve...
But a nearby policemans' gun?
MRI's are machines that take three dimentional pictures of the inside of the body...they are a wonderful breakthru in medicine...
LINK
Of course, they make a lot of noise, and unlike CT scans, you might have to sit inside one for 15 minutes; about 10 percent of patients have claustrophobia and have to be given sedatives..sitting inside one is like sitting in a noisy coffin...and these patients and obese patients now can get "open" MRI's which leave part of the circle open so are not as stressful...
And like any magnet, it attracks metal...IV poles, policemen's guns...oxygen tanks..buttons...
It's not really funny...
The most notorious accident was the death of 6-year-old Michael Colombini in 2001 at the Westchester Medical Center in Valhalla, N.Y. He was sedated in a scanner after a brain operation when his oxygen supply failed. An anesthesiologist ran for an oxygen tank and failed to notice that the one he found in the hall outside was made of steel. As he returned, the tank shot out of his hands, hitting Michael in the head.
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