[Gate-users] question about the coincidence window

yuxuan.zhang at di.mdacc.tmc.edu yuxuan.zhang at di.mdacc.tmc.edu
Thu Apr 26 00:35:27 CEST 2007

hi All,

I have a question about the definition of the coincidence time window, 
which might be
different among the GATE society and the nuclear electronics people.

According to the GATE user's manual, the coincidence window is the width 
of the single pulse,
however, according to some literature and electronics engineering people, 
the coincidence windows
are defined as twice of the width of the single pulse. So if they say one 
PET camera has a 
coincidence window of 10 ns, this should mean that the width of the single 
pulse is 5 ns. 
If this is the case, then we should setup the coincidence window in GATE 
simulation as 5 ns 
rather than 10 ns.

I've checked several published papers about the validation of the GATE, no 
one has made any comment
on this issue explicitly. So I brought this to you attention and hope you 
can give some comments.

Best regards,


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