Re: X-rays and Computers

["Sandy Perle" <sandyfl@earthlink.net>]

> The newer CTX units give exposures in the range of 3-10 milli-R using
> the same setup.

Jack,

If there are in fact exposures from the newer CTX units ranging up 
to 10 mR, that could affect personnel dosimetry devices, especially 
film dosimeters. This could be a problem, be it a small one, if 
routine mail shipments pass through these units on a frequent 
basis. While the overall exposure is still small, large shipments 
could receive a non-uniform exposure, and, depending on where the 
Control Badges are positioned within the shipment, there may be 
resultant false positives reported.

I suppose the first question is, are the above exposures a rate, or 
final cumulative exposure to a single item? If this is a exposure 
rate, not too bad. If it's a final cumulative exposure, that is another 
thing. Second question would then be, do mail shipments routinely 
pass through these type of units, and if so, how many times in a 
typical flight that crosses several airline flights would the shipment 
be exposed to?

Thanks for the information.

------------------------
Sandy Perle
E-Mail: sandyfl@earthlink.net
Personal Website: http://www.geocities.com/scperle


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