Are you sure Jon? I think there might be a health and safety issue with x-raying people . You need a pretty powerful machine to x-ray right through a shipping container.
More likely they use sniffer dogs and infra red heat sensing equipment.
Anyway getting film and gear on planes in some countries can be a problem now and again. And right now it's a problem in the uk.
During the recent high alert film was not allowed on board. Official advice from the airports authority in the UK has been not to check film into the hold. But neither would they allow it on board for over a week on flights out of the UK. They stated that film would be checked into the hold at the passengers own risk. In other words there was point in flying if you were taking film.
At the moment you can get it onboard the plane I understand, but hand baggage allowance is restricted, though it has been stated that this will be relaxed any day now.
Getting round the hand baggage scanner is not always easy. If you are just doing one or two passes there is no need to worry, just make sure the scanner is marked film safe. If you are doing work for a client or you have many flights you may still wish to get the film on board without getting it scanned. Multiple scans or one faulty scanner can effect your film.
Best advice is download and print the x-ray advice from the Kodak web site. Read it, understand it, and mark the relevant areas
http://www.kodak.com/global/en/service/tib/tib5201.shtml#SEC43
Phone the airport and airline and seek advice, refer to your Kodak document, or at least arrive at the airport in plenty of time. Raise the issue at check in, and again proceed to passport control with plenty of time to spare.
I recently (April) flew from Glasgow, via London and Vienna on the way to Tirana. I only got scanned once and that was at Glasgow (two planes had been diverted to nearby Prestwick with onboard bomb scares that week). Everywhere else, armed with the Kodak advice, a good few rolls of Delta 3200, and stating that I often 'push process' I managed to get hand searches. The easiest place to get a hand search was Heathrow to my surprise. They just said no problem, and then swabbed my film canisters for explosives. Nobody else swabbed my film. If you have business cards or paper work stating that you are a professional shooter that can help too.