I'm not an authority on the danger to film from airport scanners. Nobody should take my word for the safety of your film. I remain skeptical of film being damaged by CARRY ON scanners based on my own experience sending film through them. If I was carrying film I felt was extremely important, I'd err on the side of caution and ship it ahead. I wouldn't attempt to rely on hand inspection. Whole bag scanners for checked luggage are an entire 'nuther ballgame. Checked luggage scanners are much more powerful.
The last time I asked for hand inspection, I was carrying about 20 rolls of 120 film in new sealed boxes. Admittedly, the screening area was busy at the time I went through. I had my film in a gallon sized Ziploc bag and I asked for it to be hand inspected. The lady didn't even look up. "If it's less than 800 speed film, it can go through." I was ready for that response and told her I was carrying it on several legs of flights and since the effect is cumulative, I'd like it hand inspected. She rolled her eyes and yelled, "Hand inspection here." I guess nobody heard her the first time and she had to yell it again. Eventually, a guy takes my film and I go through the scanner myself and join him inspecting my film.
The TSA inspector opened every single box and removed the film (in the foil wrapper). He swabbed each individual roll, one at a time, and placed the swab in the machine to be checked. It took at least 20 minutes, maybe more, to swab and check each roll of film. I could tell he was in no hurry at all. When he was finally done, he left me a tray of twenty empty boxes and twenty rolls of film to put back together myself. They made their point. I haven't asked for hand inspection since.
Kodak issued a
Technical Information Bulletin in 2003 warning about the dangers of airport scanners to unprocessed film. They didn't specifically address carry on scanners. The damage examples they show were from checked baggage scanners. BTW, the damage they show looks like this:
That was 14 years ago and scanner technology has no doubt changed since then, but I wouldn't know if any changes were better or worse for film. I send my film through the carry on scanners, but I'd never send unprocessed film through checked luggage scanners.