During my recent successful treatment for Lumphoma (cancer of the lymphatic system), one of the item discussed with my doctor was the higher level of radiation exposure we pilots are subjected to flying at high altitudes. And by the way it is worse for long haul than short haul. My point is that we pilots are already subjected to more than enough radiation and we should not allow ourselves to be subjected to any more. I would suggest frequent flyers could be in the same situation.
There, I for one will prefer the pat down where required and not the machine.
Have a nice day