Everything effects you
What is it with these "safe levels". No-one bloody well knows for sure - they are just using their best guess.
Have a read of "Bad Medicine" by John Archer.
He reports on how inaccurate many radiation machines are, their lack of maintenance, poor calibration and operators who aren't even aware of the dose that you will be receiving.
As he says, "All ionising radiation damages human chromosomes. There is no safe level. The lower the dose the less likelihood of damage. All xray examinations, whether they are dental or medical, are cumulative and each exam increases the risk of several types of cancer"
So who will be maintaining the detectors? The same ones looking after the medical equipment?
I'll cop a known grope over an unknown level of radiation exposure any day.
Everything your body is exposed to either contributes to your health or harms it.