[Gate-users] Example PET_Ecat_System.mac Geometry problem? 6.1.98524

[J.Jones at surrey.ac.uk]

Fernando,
I am happy to be reassured but would you tell me what the Tungsten structures are for as they don't appear to fit around the detector?
Are you suggesting they are superfluous and could be removed?
I want to understand their function as I wish to extend the size of the detectors and don't understand what to do about them.


John


________________________________________
From: Fernando Rannou [fernando.rannou at usach.cl]
Sent: 29 March 2012 13:48
To: Jones JH Mr (PG/R - Electronic Eng)
Cc: gate-users at lists.opengatecollaboration.org; jones.john.h at gmail.com
Subject: Re: [Gate-users] Example PET_Ecat_System.mac Geometry problem? 6.1.98524

Hi John
As far as I understand, only "attached" volumes will show up in the description.
So, I don't think you should be concerned.


Fernando Rannou

On Thu, Mar 29, 2012 at 8:13 AM,  <J.Jones at surrey.ac.uk> wrote:
> Hi,
> Using GATE 6.1.98524,
> I am planning on modifying the PET_Ecat_System example but have noticed something strange.
>
> If I use /gate/systems/describe, the output shows only base block and crystal levels.
> However, the .mac also contains references to carter, carter1, .... carter4 which are various tungsten cylinders with 'carter' being a daughter of world.
> There is no mention of 'carter' in the output log. there is no mention of carter in the vicinity of 'attach' within the mac files.
> There does seem to be a wireframe structure in front of the detector ring in the visualisation.
>
> The macro seems to run OK - I have produced Ecat7 sinograms which run through STIR and produce an output image.
>
> Should I be concerned?
>
> Thanks
>
> John
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