Going by the scans I had on my spine, it all depends. I had a (private) MRI in the UK where they only concentrated on the discs and bones and gave basic info about the damaged disks and facet joints rubbing together, whereas a CT scan here in België resulted in a more detailed report including picking up what looked like arteriosclerosis. Oh, also had NHS x-rays in UK before the MRI where they said there was absolutely nothing wrong with my back whereas x-rays over here picked up even more things that weren't checked when the scans were done
Different scans/xrays/hospitals/radiologists, different results. They do seem to be somewhat more thorough in their investigations over here though.