Lachlan.
You miss 100% of the shots you never take. -- Wayne Gretzky
I don't trust any of them. It's interesting how they changed the policy on second level screening for children. Tells me they realize they weren't doing things in an ethical manner.
http://oas.uco.edu/05/paper/Bragg.pdf
I intended to post this during the height of the discussion. Better late than never. A nice replication study!
That's not a flaw, but a feature. All of the studies I've read have the same characteristic. I think they are relying on standards and design/calibration controls to ensure that the machines used are representative. I don't know what controls are in place in the field to ensure calibration, etc but I would hope that they are fairly rigorous in most countries. But that is specualtion on my part so I may or may not be correct.
Hot places, yes, but the fogging patterns on my film were consistent with characteristic patterns found on film in documented and deliberate cases of Xray fogging. I've been in extremely hot places before with B&W film and had no problems. The difference on this trip was the number of times the film was subjected to scanning and probably the type of scanner, which may have been a specially heavy-duty one and not a standard one used for hand luggage.
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