Hi,

"Paris, Leonard" wrote:
> 
> There must be some reason X-Ray techs wear lead aprons in hospitals.
> Perhaps because they protect vital parts from X-Rays?  If the X-Rays from
> airport scanners are strong enough to pass easily through these lead bags,
> there's a good chance that they are also hazardous to unprotected people.
> 

It's a slightly different scenario.  The rays in hospital are
"free", not inside a lead lined box (the airport scanner) which
provides primary protection.  Scanners "focus" the rays and vary
the power to get through denser objects.  The power needed to
penetrate many of the household objects in luggage is much more
than that needed to penetrate tissue.

mike
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