Shoe-fitting fluoroscopes were used in the 30s, 40s, and 50s to x-ray customers' feet to make sure their potential new shoes were fitting correctly. The machines were eventually banned because of radiation concerns, but not before causing some injuries to their operators. "Many shoe salespersons put their hands into the x-ray beam to squeeze the shoe during the fitting. As a result, one saleswoman who had operated a shoe fitting fluoroscope 10 to 20 times each day over a ten year period developed dermatitis of the hands." (via that's how it happened)
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