This is insultingly nonsensical from the TSA. The reason they list might be a reason not to require dosimeters, but it's certainly not a good reson to prohibit

This is insultingly nonsensical from the TSA. The reason they list might be a reason not to require dosimeters, but it's certainly not a good reson to prohibit it. And it's not a good reason not to require it, either, since the purpose of dosimeters is not just to measure radiation accumulated by an operator, but as part of the alert system for a malfunctioning device.