the airport xray scanners and film

a box of new and unused iso 400 medium format films got exposed to the scanners at the airport in bangkok. reliable accounts regarding films that fog with repeated exposure to airport xray scanners are all over the internet. airport xray scanners have actually gone stronger since 9/11. and i personally saw how strong one was at a terminal abroad.  i had films in a film bag that had two layers of lead that went through the scanner and i had a chance to glance at the monitor.  the silhouette of the film canisters appeared on their screen. if this was a higher speed film, damage would be expected.  this is the reason why i appreciate the security personnel in suvarnabumi airport for accepting the bag of films i submitted for hand inspection.  checked-in baggages go through CT scans. and these are even more powerful radiation devices. fortunately, we rarely see them. below are photos that came from one of those films that went through the carry-on bag scanners. and it looks like they are unscathed.