Our local shoe store had a foot x-ray machine that was ready for anyone to use. I remember using it in the late 50's
Just step up and slip your foot (with shoe on) into the opening and it would show an x-ray of your foot for fitting. It was called a fluoroscope.
Whenever I went into the store with my family....I would step up and get the ray's.
I don't think it was a good idea.
https://derekcadzow.com/2020/03/18/and-then-my-feet-fell-off/