[Gate-users] problem of repeat number

Sebastien JAN sebastien.jan at cea.fr
Thu Feb 14 12:34:37 CET 2008


Hi,

As you can read in the Users Guide, page 115, the default value for the 
minimum sector difference for valid coincidences, is 2.
You need to change this value with the following command:
/gate/digitizer/Coincidences/minSectorDifference <number>

S.JAN

> Dear Gate users
>
> 2 head (like 2 head SPECT) PET was simulated using cylindrical PET code.
>
> I found that there are no detected coincidence in case of < 4 ring 
> repeat number
>
> However, there are detected singles event.
>
> It is not due to low sensitivity.
>
> In all cases ( < 4 ring repeat number), detected coincidence are 
> definitely 0.
>
> What do you think about this problem?
>
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