[Gate-users] The gateCoincidengces.dat is empty

[Marlen Priegnitz]

Hi,

if you simulate a double-head PET camera, be sure to set
/gate/digitizer/Coincidences/minSectorDifference 1
.
The default is "2", this is the difference between the detectors that 
registered your coincidence. That means, a coincidence can not occur in 
2 detectors that are directly next to each other. For a fulring this is 
definitely reasonable, but for a double-head camera this does not work 
and has to be set to "1".

Hope this helps.

Kind regards,
Marlen





cindy Dong wrote:
> Hi,
>   I'm new to Gate.
> I want to simulate a PET system which consists of two detector heads facing
> each other ,but the output is that it has gateCoincidences.dat
> (/gate/output/ascii/setOutFileCoincidencesFlag 1)but it's empty,while
> gateSingles.dat&gateHits.dat are filled.Why?Is it because that
> gateCoincidences.dat has rsectorID,moduleID, submoduleID,crystalID while the
> flat panel scanner doesn't have such system geometry(I designed the
> PETscanner consists of level1,level2)? If that,how should i design the flat
> panel to get the coincidences information?
> Thanks for your help,
> Cindy
> _______________________________________________
> Gate-users mailing list
> Gate-users at lists.opengatecollaboration.org
> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users

-- 
Marlen Priegnitz             |  Forschungszentrum Dresden-Rossendorf
Tel. : 0351/260 3307         |
Fax  : 0351/260 3700         |  Postfach 510119
Email: m.priegnitz at fzd.de    |  D-01314 Dresden
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