Yanno i kind of feel that constant xrays and scans are probably more problematic than they are worth. We ALL end up with lung damage, it's invetible. It is largely permananet lung damage too, so what is the point in exposing ourselves to regular doses of radiation just so the docs can say say 'ooh look, you have CF, we can tell from the changes in your lungs'. It makes you worry more and achieves precisely nothing. My xrays never show active pneumonia even when i'm having an exacerbation so i don't let them do them anymore. Once a year to make sure i don't have a massive tumour growing, and that's their lot. Sometimes, ignorance is bliss.