My dentist said something like "it exposes you to less radiation than eating a banana", but she also left the room when the machine was firing.
In retrospect, the policy should be to let the parent stay. The risk to me is no worse than the risk to my kid. It's easy enough to explain why the tech should go behind a shield.
Yes, it's an incredibly small amount of radiation for you because you're only in there for one X ray maybe once a year.
For someone who operates the Xray maybe a half dozen times in a day (or more), every day, that number changes dramatically. It's still likely fine, but it's far better to be safe than sorry.
Nothing wrong with eating bananas, but I wouldn't want to eat 20 a day for all sorts of reasons.
So my friend asks for the explanation. Guy asks him "what's the strongest animal?"
The answer (which I would dispute) was 'the gorilla'
"And what do gorillas eat?"