Quote Originally Posted by polyglot View Post
Reportedly the checked luggage scanners are higher power and I deliberately left a blank roll of Ektar in my checked luggage for a couple of flights to test that.
For the CT scanners in use in most of the world it is not really a matter of "reportedly" but more of IF USED. The modern CT scanners are two-stage. First scan is a regular x-ray about the same as that used for the carryon bags. If there is reason for additional scanning, the CT is used and that is what ruins the film. So film in carryon bags is OK, but film in checked baggage is a crap shoot.