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Re: Q about dose: Airport X-ray Security Scanner
The devices in question do not image tissue, but rather scan the outside surface of the body with backscattered x-ray looking for hard objects (i.e. weapons). The image produced is really quite fascinating. Its like looking at a featureless gray doll, with the hard objects visible on it.
An excellent example of what these images look like is available on Rapiscan's home page at www.rapiscan.com/documents/main. Click the "Products" Button in the left frame, and then the "Personnel Scanners" at the bottom of that page.
Hans J. Messersmith
hmessers@isdh.state.in.us
Indoor and Radiologic Health
Indiana State Department of Health
>>> "Robert Gunter" <rjgunter@icnpharm.com> 01/04 1:40 PM >>>
Quick question,
If these things are effective giving doses of 3 uR, why are the doses for
diagnostic X-rays so much higher. I the beam intensity required for good
imaging of tissue and etc reallyt that much higher?? It seems like we are
talking orders of magnitude difference.
In a message dated 01/03/2000 1:07:38 PM Pacific Standard Time,
glenn@u1st.com writes:
<< Based on the
manufacturer's claims (and claims of independent verification) the dose
was reported as 3 uR (0.03 uGy) for 4 views total (front, back, and both
sides). >>
Rob
----------------------------------------------------------------------------------------------------------
Robert J. Gunter, CHP Tel: (714) 545-0100
Sr. Technical Specialist Tel: (800) 548-5100 Ext. 2414
ICN Biomedicals, Inc. Fax: (714) 668-3149
Dosimetry Division Email: rjgunter@icnpharm.com
3300 Hyland Avenue
Costa Mesa, CA 92626
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