On Jan 14, 2014, at 14:52, Tahereh Niknejad <tahereh.nik@gmail.com> wrote:

> Dear Gate users,
>  
> I want to study the time of flight PET with Gate output.
> But, the time of photons detection in the root output is with 6 digits after the decimal point. therefore, time 1 and time 2 are exactly the same, even if the source is not in the middle and around 1000 meter is needed to have the time difference between two photons in coincidence.
>  
> Is there any advice how can I get the time difference?
>  
> Best regards,
> Tahereh
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