[ RadSafe ] University of Michigan News Service | Revolutionary nuclear radiation detector hits the market

[Ted de Castro]

Thanks

That would certainly confirm my suspicion of low sensitivity and also 
imply low resolution (as one could infer from the image in the first 
article as well) - but I still don't see "pocket sized".

But find in minutes what took weeks???  I don't think so!  Any source 
large enough for this to work could be found quickly.  Back in the day 
we fashioned a "gamma telescope" - a GM or NaI detector in a thick Pb 
Cylinder for a collimator to locate emission sources within a linac 
THROUGH the shielding.  That worked well enough and quickly enough - 
minutes to an hour NOT weeks - It was hardly "pocket sized" but ALMOST 
"hand held" at least for a short time <grin>!!

Substitutes coincidence in a 3d array of very small detectors for the 
traditional collimation approach to achieve an image.  Almost "reverse 
ct" I'd say.


On 3/13/2014 10:44 AM, JOHN.RICH at sargentlundy.com wrote:
> Here's a semi related article.  It almost sounds like the trick is in the
> software.  Could it be a variant of the reconstruction used in a CAT scan?
> later  - -jmr
>
> http://www.technologyreview.com/view/422496/the-nuclear-camera-designed-to-spot-hidden-radiation-sources/
> John Rich
> 312-269-3768
>
>
>
> From:   Ted de Castro <tdc at xrayted.com>
> To:     'Radsafe' <radsafe at health.phys.iit.edu>
> Date:   03/13/2014 12:31 PM
> Subject:        [ RadSafe ] University of Michigan News Service |
> Revolutionary nuclear radiation detector hits the market
> Sent by:        radsafe-bounces at health.phys.iit.edu
>
>
>
> http://ns.umich.edu/new/releases/22038-revolutionary-nuclear-radiation-detector-hits-the-market
>
>
> Supposedly "A handheld radiation camera":
>
> Has anyone seen one of these work??
>
> It seems the source SHOULD be credible but I can think of so many
> reasons it just cannot work!!  I mean a pocket pho gam camera????
> really????
>
> Even if it did - it would most certainly only be for VERY high
> fields/sources - certainly not the kind of thing "if formerly took weeks
> to find" as they allege.
>
> AND certainly not applicable to Fukushima as they imply at least not
> outside the plant itself.
>
> IF in fact this IS true - it certainly is interesting.
>
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