[ RadSafe ] Z-Backscatter technology

[Bradt, Clayton (HEALTH)]

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