[ RadSafe ] Z-Backscatter technology

Jason Meade meadeja at vcu.edu
Thu Oct 22 13:44:12 CDT 2015

The darker appearance of the lungs in the Z-Backscatter pictures is due to
the image reconstruction software.

On Thu, Oct 22, 2015 at 11:13 AM, Bradt, Clayton (HEALTH) <
clayton.bradt at health.ny.gov> wrote:

> https://bgr.com/2015/10/16/nypd-x-ray-spy-vans/
> Does anyone know how I might get ahold of technical information on the
> Z-Backscatter technology as used for example by the AE&S vans mentioned in
> the above article? I am especially curious as to how the image of the
> contents of a vehicle is not obscured by backscatter off of the sides of
> the van and of the vehicle being scanned. Both the beam and scattered
> x-rays must pass through both vehicles on the way out and back. Also I'm
> curious about the density information presented in the images of people
> within a trailer. They appear to show the individuals lungs as dark regions
> within the thoracic cavities. I would not expect this from a backscatter
> image.
> Clayton Bradt
> Principal Radiophysicist
> NYS Dept. of Health
> 518-474-1993
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Jason A Meade
Senior Radiation Safety Specialist
Virginia Commonwealth University

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