[ RadSafe ] Z-Backscatter technology

Guilmette,Todd tmg73 at drexel.edu
Fri Oct 23 15:06:53 CDT 2015

>From the article:

"The top image shows how such technology might be used to discover human trafficking."

>From that wording, the image is likely a Photoshop job, and if the image is nonsensical, then the artist is unfamiliar with the actual scans produced.


Todd Guilmette
Radiation Safety Technologist
Office of Research

Drexel University
New College Bldg. Rm. 3209
245 N 15th Street Mailstop 106
Philadelphia, PA 19102
Tel: 215.762.3411 | Fax: 215.762.1608

"I will not be pushed, filed, stamped, indexed, briefed, debriefed or numbered." - Number 6

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Bradt, Clayton (HEALTH)
Sent: Friday, October 23, 2015 1:13 PM
To: Jason Meade; RADSAFE
Subject: [ RadSafe ] Z-Backscatter technology

Are you saying that there is not a decrease in the backscatter signal in those dark areas? If so why would the imaging software draw such apparently accurate lung-like regions within the chest cavities?

Jason Meade wrote:

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<mailto: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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