[Gate-users] CylindricalPET inside a large lead box or cylinder ?

[Simon Stute]

Hi,

2008/1/24, Sanae Rechka <Sanae.Rechka at usherbrooke.ca>:
>
>
> Dear Gate users,
>
> Is it possible to place the CylindricalPET inside a large lead box or
> cylinder
> to store the energy of photons outside the scanner (photons which escape
> from
> the scanner)?


One possibility is to define the world material to lead, an other is to
define a big lead box over your CylindricalPET, but there is no interest to
do such a thing because in lead your gammas will be stop before traversing
one mm ! so they won't escape from your box and you will not be able to see
them after. I don't really see a solution to your investigation at the
moment but if I have an idea, I will send you (but I think this is not
possible without modifying the gate source code and even the geant4 source
code !)

Good luck !
Simon

Of course, I am aware of this :
>                           Gate only stores hits for those volumes attached
> to a
> sensitive detector. A volume must belong to a system before it can be
> attached
> to a sensitive detector.  And system should be one of the systems defined
> in
> page 48 of the Gate users Guide. I'm aware of that.  And it's why I'm
> asking....
>
>
> Can any body answer my question please ?
>
> Thank you very much in beforehand
>
>
> Sanae
>
>
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>
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