[ RadSafe ] Baggage Inspection X-ray Systems

[Sandy Perle]

Mike,

While not directed at baggage X-ray scanning, here is a description 
of ANSI N43.17-2002 (from HPS Standards Page), which may provide some 
points for considerations. If you are HPS member, you can download 
the standard.:

Radiation Safety For Personnel Security Screening Systems Using X-
rays

A new imaging technology is gaining importance in screening 
applications for security and contraband. Systems that use ionizing 
radiation, designed to be used directly on people, have been 
installed by several institutions in the United States since the 
1990's. The technology allows much lower doses than more conventional 
x-ray methods. The doses are typically lower than allowable limits 
for incidental exposure to the general population from man-made 
sources. When the technology became commercially available, little 
guidance existed for this type of intentional, non-medical radiation 
exposure. In June of 2000 the HPS/ANSI Accredited Committee N43 
appointed working group N43.17 to draft a consensus standard 
addressing the radiation safety of this technology. 

This standard applies to security screening systems that use x-rays 
and are designed to be used on people. Specifically, this standard 
applies to systems used to detect objects carried on the individual 
being exposed. The standard provides guidelines specific to the 
radiation safety aspects of the design and operation of these 
systems. It does not include electrical safety guidelines or any 
other safety, performance or use considerations outside of the realm 
of radiation safety. The standard is intended for manufacturers, 
distributors, installers, and users of the systems. 

In setting dose limits the standard takes into consideration the 
minimization of the dose as balanced against the security benefit to 
society. This precludes the frivolous use of the security devices 
where no benefit is to be derived. The standard contains two 
informative annexes. Annex A provides information on risks associated 
with radiation doses and the rationale for the dose requirements in 
the standard. Annex B provides information required to make 
appropriate radiation measurements.



-------------------------------------
Sandy Perle
Senior Vice President, Technical Operations
Global Dosimetry Solutions, Inc.
2652 McGaw Avenue
Irvine, CA 92614 

Tel: (949) 296-2306 / (888) 437-1714  Extension 2306
Fax:(949) 296-1144

E-Mail: sperle at dosimetry.com
E-Mail: sandyfl at earthlink.net 

Global Dosimetry Website: http://www.dosimetry.com/ 
Personal Website: http://sandy-travels.com/