The piece of
equipment I was scanned by had spent [its] working life
surrounded by radioactive material. Admittedly in lead containers.
but even so, I suspect the hospital would be wary of disposing of it
to a memeber of the public.
Why? Radiation is like light - shine a flashlight at
something
(non-phosphoric, pedants! ;) and it doesn't continue glowing. Things
that have been exposed to radiation don't radiate.
I guess that's why breeder reactors don't exist.
Seriously, while I'm not a radiologist, I'd expect this to depend on
the form of the radiation: I'd hazard a guess that X-rays and gamma
(and generally electromagnetic) you're right, but alpha, beta, or
neutrons, you're wrong.
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