[gate-users] world XYZ position - Coincidence file

[Schmidtlein, Ross/Medical Physics]

Hi Angela,

The digitizer section of the Users Guide describes how coincidences are
built from singles and singles from hits.  It is this process that
defines the detection position within the scanner's geometry.  There are
several options available that can alter the detection positions.  Look
through chapter 9 and, in particular, look at the adder and readout
modules.  I think this section will answer most of your questions.

Cheers,

ross

-----Original Message-----
From: gate-users-bounces at lphe1pet1.epfl.ch
[mailto:gate-users-bounces at lphe1pet1.epfl.ch] On Behalf Of Angela M K
Foudray
Sent: Monday, August 02, 2004 4:20 PM
To: GATE feedback and helpline for Users
Subject: [gate-users] world XYZ position - Coincidence file


I have a question regarding the XYZ position (columns 4 through 6 and
"25" 
through "27").  Is this the centroid of the interactions in the
detector, 
the location of the photoelectric interaction or what?  What does "the 
position" mean since there are potentially quite a few interactions for 
each event that should be considered.

Thanks,
Angela Foudray



Angela Foudray
Stanford University Medical Center
300 Pasteur Dr. M/C 5344
Stanford, CA 94305-5344
afoudray at stanford.edu

lab:	(650) 736-2598
fax:	(650) 736-0234

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