Re: X-Ray Vision Is Here

[Gary Masters <gmasters@devcg.denver.co.us>]

On Tue, 8 Apr 1997 Lester.Slaback@nist.gov wrote:

> I find this somewhat amazing (incredible?).
> 3 microrem at 40 keV (a guess) represents about 3 E+4 photons per sq.cm.
> Assuming the body is 20 cm thick this given an attenuation of E-3,
> resulting in 30 photons/sq.cm to image with (assuming the weapon removes
> the rest). At 100 keV one would have 1000 photons/cm2, but with less

I read something about the technology several months ago.  As I recall,
the device detects photons scattered off of the body, and other dense
objects.  I do not believe the device measures photon attenuation like a
typical diagnostic X-ray.  The photons need only be energetic enough to
penetrate garments.



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