[Gate-users] Compton interactions within the crystal

[Chen, Yu]

Dear Anayisse,

Very interesting question!

>The ASCII file gateSingles.dat  can give us the number of Compton interactions in detectors before reaching the detector.
>Can we have also the the ID of those detectors ?

In principle, yes.
But I doubt if it is implemented in current GATE.

>From GATE manual, what I can learn is that Singles is from Pulse, and the latter is given by centroid of hits (weighted by energy).
What I am not clear is if a Pulse is only related to individual detector. i.e., Can a photon generate and be recorded several Pulses 
in different detectors (crystals) if scatter (and/or penetration) occurs?

1)If yes, then it is possible to record the first pulse information besides that single (I assume it is centroid of pulses) information.

2)If no, (that is, one photon, one pulse, one single) we can try to record the first hit information (global X,Y,Z and crystal ID) into
corresponding Single though they are not experiment-detectable.

I prefer solution 2), which can give us precise information on how big the scatter and penetration effects are.   

My two cents.

Yu Chen, Ph.D.
University of Massachusetts Medical School
Division of Nuclear Medicine
55 Lake Avenue North
Worcester, MA 01655-0243
Phone:  (508) 856-6123
Fax:    (508) 856-4572



-----Original Message-----
From: gate-users-bounces at lists.healthgrid.org on behalf of anayisse arnaud
Sent: Tue 12/11/2007 12:11 AM
To: gate-users at lists.healthgrid.org
Subject: [Gate-users] Compton interactions within the crystal
 

Hi !

I need your help Please !

The ASCII file gateSingles.dat  can give us the number of Compton interactions in detectors before reaching the detector.
Can we have also the the ID of those detectors ?

Thanks in beforehand
Anayisse


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