[Gate-users] GATE running problem--WARNING : positron found and photonID vector size 1

[Su, Yi]

But does every place inside the 'world' have an associated material (default is 'Air' if not otherwise specified), and when the positron leaves the 'world' it is not tracked anymore. I didn't define any sub-volumes inside the 'world' to be vacuum.

Yi

-----Original Message-----
From: Fernando Rannou [mailto:rannou at diinf.usach.cl]
Sent: Friday, January 04, 2008 1:43 PM
To: Su, Yi
Cc: 'gate-users at lists.healthgrid.org'
Subject: Re: [Gate-users] GATE running problem--WARNING : positron found and photonID vector size 1

I think this is because a positron was found
in a "void" volume, where it will never find an electron


Fernando

On Fri, 2008-01-04 at 13:31 -0600, Su, Yi wrote:
> Hi there,
>
>
>
> I am running a GATE simulation and the following warning message keeps
> popping up:
>
>
>
> [GateTrajectoryNavigator::FindAnnihilationGammasTrackID]  WARNING :
> positron found and photonID vector size: 1
>
>
>
> Does anyone know what is going on, and what might be the problem? I am
> using Gate 3.1.2 and I am simulating an ecat system with a simple
> cylinder phantom and source.
>
>
>
> Thanks a lot,
>
>
>
> Yi
>
> __________________________________________
>
> Yi Su, PhD
>
> Division of Radiological Sciences
>
> Mallinckrodt Institute of Radiology
>
> Washington University School of Medicine
>
> Campus Box 8225
>
> 510 S. Kingshighway Blvd
>
> St. Louis MO 63110
>
> Phone: 314-362-8363
>
> Fax:       314-362-9940
>
> Email: suy at mir.wustl.edu
>
>
>
>
>
>
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The materials in this message are private and may contain Protected Healthcare Information.  If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited.  If you have received this email in error, please immediately notify the sender via telephone or return mail.