[Gate-users] About the Judgement of true coincidence, random coincidence and scattered coincidence

[J.J.M. Kouwenberg]

Dear Arno,

This is correct. A ROOT to sinogram conversion script is given here: http://www.opengatecollaboration.org/STIR; it handles the coincidences similar to your code.
Promt coincidences are all coincidences recorded combined: true, scatter and random

Regards,

Jasper J.M. Kouwenberg
Medical Physics Graduate student
Nuclear Medicine



E-mail j.kouwenberg at erasmusmc.nl | Phone +316 2532 9809

________________________________________
From: gate-users-bounces at lists.opengatecollaboration.org [gate-users-bounces at lists.opengatecollaboration.org] on behalf of Arno_gmail [arnoxiaolei86 at gmail.com]
Sent: 06 May 2015 16:01
To: gate-users
Subject: [Gate-users] About the Judgement of true  coincidence, random coincidence and scattered coincidence

Hello everyone:
I am confused with extracting the true  coincidences, random coincidences and scattered coincidence from root file, and do not know whether it is right to do as follows.


if ( eventID1 != eventID2 )
{
Nbr_Coinc_Random++;
}
if(eventID1 == eventID2&&(comptonPhantom1 != 0 || comptonPhantom2 != 0))
{
Nbr_Coinc_Scanners++;
}
if ( eventID1 == eventID2 && comptonPhantom1 == 0 && comptonPhantom2 == 0 )
{
Nbr_Coinc_Trues++;
}

By the way, what is the definition of "prompt  coincidences". Thanks a lot! Best wishes!