I apologise in advance because this post it isn't directly related to Dan's post, but after Sherrie Lynns post I remembered how I got my first CAT scan post treatment:
About 6-8 months after radiation I felt a strange sensation while breathing. Over several days I got more and more worried until I finally called for a rush dr's appointment. My doc was booked for 2 weeks and I couldn't wait (right?) so I got an appointment that day with a nurse-practitioner.
While I am waiting in the exam room I see a poster for anxiety symptoms (one of which is breathing sensations and tightness in the chest) SO after her exam where she finds nothing, I mentioned the poster on the wall. She says "would you like me to make an appointment for you to see a psyciatrist?" To which I replied "If they can tell me the cancer isn't in my lungs then go for it!" She excused herself from the room presumeably to consult with my regular Doc (between patients) and came back several minutes later with an appointment for a CAT scan.
The CAT scan was normal so apparently I should have seen the shrink!

:p