Just because a lot of the cosmic radiation during the flight is also 'X-Rays' also doesn't mean the exposure is equatable by a simple multiplier in tissue effec

Just because a lot of the cosmic radiation during the flight is also 'X-Rays' also doesn't mean the exposure is equatable by a simple multiplier in tissue effects. The specific energy, delivery, and timing could all be worse or better. Given non-linear effects like hormesis, the scanners (or flight) might even be good, at some levels, then turn bad. It ought to be studied, with the actual devices in real-world scenarios, and to the same level of scrutiny of medical radiation devices -- which have themselves killed people when misunderstood or misprogrammed. Instead, the TSA's use seems rushed through a different less-accountable process, with a bunch of hand-waving "this is kinda like that" reassurances.