RE: Franz - RE: X-ray of packages and containers

["Jacobus, John (OD/ORS)" <jacobusj@ors.od.nih.gov>]

Dave,

I would add that the lung fields appear to be transparent, indicating low

attenuation.  Bone in the body are not visible due to soft tissue scattering

and lack of collimation.



-- John 

John Jacobus, MS

Certified Health Physicist 

3050 Traymore Lane

Bowie, MD  20715-2024



E-mail:  jenday1@email.msn.com (H)      



-----Original Message-----

From: Neil, David M [mailto:neildm@ID.DOE.GOV]

Sent: Thursday, September 27, 2001 3:42 PM

To: 'Franz Schoenhofer'; David_S_Hyder@RL.GOV; magna1@jps.net;

radsafe@list.vanderbilt.edu

Subject: RE: Franz - RE: X-ray of packages and containers





While I can't answer your objections concerning shielding and exposure, the

image is more consistent with xray than infrared.

*  Infrared images are much less detailed, especially when the 'emitter' is

inside the object instead of on its surface.

*  The contents of the packages inside the truck show as well.  This would

require a thermal difference between the contents and the packaging to

produce on an infrared photo.

*  The things expected to be denser are darker, rather than the things

expected to be warmer being lighter (e.g. the outside of the tires)

. . .

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