At nine, I have the MRI, which I'm actually quite looking forward to. a) It shouldn't hurt at all, b) I'm not claustrophobic, and c) it's going to be an interesting experience, that I then get to write about.
Did I mention the protagonist of my current SF novel is a young doctor? I keep having this funny thought that my cancer means I'll get to study lots of doctors at close quarters in their natural environments... Research! :-)