[Gate-users] Re : (no subject)

[dounia84 at aol.com]

hi,

Thank you for this answer cheick but I am still missing something, I don't get what kind of coincidences are reported in root, is it the true one (Rtrue=Rtotal - Rscatter - Rrandom) or the "prompt"?

Cheers,



 


 

 

-----E-mail d'origine-----
De : THIAM Cheick 219838 <cheick.thiam at cea.fr>
A : dounia84 at aol.com; gate-users at lists.opengatecollaboration.org
Envoyé le : Mardi, 9 Février 2010 18:12
Sujet : RE: [Gate-users] (no subject)


Hi

The ROOT file is filled during simulation and contains three reps: 
- Hits: containing the news for hits, 
- Singles: containing the news for digitizer (pulses),
- Coincidences: containing the news for the coincidences in the case of a PET 
simulation.

Hit is a snapshot of the physical interaction of a track within a sensitive 
region of a detector. All information: position and time of the step, energy of 
the track, energy deposition of the step...

The digitization consists of a series of signal processors. The output at each 
step along the series is defined as a pulse. At the end of the chain, the output 
pulses are named singles. These Singles realistically simulate the physical 
observables of a detector's response to a particle interacting with it. 

You can find more explanations in the gate UserGuide.  

Hope this helps, 
Cheick



-----Message d'origine-----
De : gate-users-bounces at lists.opengatecollaboration.org [mailto:gate-users-bounces at lists.opengatecollaboration.org] 
De la part de dounia84 at aol.com
Envoyé : mardi 9 février 2010 15:46
À : gate-users at lists.opengatecollaboration.org
Objet : [Gate-users] (no subject)


 Hello,

I am trying to model a micropet scanner.I was wondering how one can get the 
number of true events (prompts - random - scatter).  I am using root v5.20 and 
my Browser displays three classes : 
Coincidences, Singles and Hits. Does coincidence class refer to trues events? Or 
prompts? What is the difference between Single and Hits?
I am missing some understanding...
If anyone could help,



-- 
Dounia Taleb
Imagerie medicale experimentale - Département de physique
Université de Liège - Institut de Physique, B5
B-4000 Liège 1 (Sart-Tilman) - Belgique
Tel: +32-4-3663152



 


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