Well I didn't want to draw any inferences. But a justification case was done. Now they don't use the X-Ray based scanners. Probably just coincidence. I am definitely not suggesting any connection.
No, it wasn't Ansto. They are not a regulatory agency responsible for overseeing the radiation protection system, across all industries. But as someone who does not work in the area you can't be expected to know that sort of detail.
But you are missing my point. The starting position was the risk is low don't worry about assessing the benefits against the harm. In other words "we think it is a good idea". The Australian national radiation protect regulator, ARPANSA, was the first group worldwide to look beyond the risk of the exposure (being low) to do a justification process.
Btw in case it wasn't obvious, I already work in radiation protection. Ansto is attractive from an experience point of view, but they just don't seem to pay enough.