Lina Bessanova's tests remain the best we have, and I doubt any of us will try to duplicate or better her efforts.
One thing to be aware of is that many of us have, down the years, accidentally put a loaded camera or roll of film through the checked baggage system and got away with it. I am equally sure that Joe Public did so back in the day because he didn't know there was an issue with checked luggage x-rays/CT scans.
For the most part I intend to get my films safely to my holiday destination, shoot some nice photos, and get them back home. But,
@wiltw has given me one idea. On the same trip last year, I had a Nikon F601M with me who's battery failed...and I had not had the foresight to take a spare with me. So I ended up putting that camera in my checked luggage, forgetting there was a partially shot roll of FP4+ in it. That roll is actually still in the camera. I might just let that roll of film go through the hand baggage CT scanner for sh!ts and giggles and report back on if it's damaged from going through both the different CT scans. I might also make up a short 10 exposure roll of some B&W film and put it through the CT scan for hand baggage.
More data points, but in no way comparable to Lina Bessanova's work. I'm most interested in if I can successfully get me films hand checked at LTN, which ought to be possible given the instructions from the DfT but you never know until you try.