Yes they do x-ray your bags, but you also have to walk through an x-ray machine in case you are carrying knives, etc.
The airport staff are used to seeing foreign bodies inside bodies, so I wouldn't worry too much. Hope you are feeling on top form & enjoy your holiday bazskelly.
The metal detectors set off the screws in my dad's ankle so yours might too - you should ask your doc, they can give you a letter confirming that the clips are there to show at the airport if needs be.
I had the 'snip' many years ago and was concerned when I had an MRI scan for a bad back, the consequences being testicle soup ! however the consultant told me that the metal was not affected by the magnetism. I should imagine your clips would be the same, and anyway they probably wont show up.