[Gate-users] NCAT Source-phantom

[Simon Stute]

Hi all,

This bug comes from the G4PhantomParameterization class of G4 that is used
when using the G4RegularNavigator (it is the case only when you use the
regularMatrix object in GATE, it is not possible for other types of
volumes).
And unfortunatly it is probably a rounding bug when some particle are
generated or interact exactly on the phantom border within the distance
tolerance of G4.
This bug has been already tracked but no satisfying solution was found !
And there is nothing related to the version of Gate in this problem.

Just launch again your simulation with another random seed...

Cheers,
Simon

2010/1/21 Ida Häggström <ida.haggstrom at radfys.umu.se>

> Dear Cláudia,
>
> I've seen that error message myself and have not figured out exactly why it
> appears. I got it when I used a voxelized phantom based on
> "parameterizedBoxMatrix" in Gate 5 (never used Gate 4). When I switched to
> "compressedMatrix" instead, everything else exactly the same, the error
> disappeared. You can give it a go! =) You can also try "regularMatrix".
>
> /Ida
>
> 2010/1/20 Cláudia Régio Brambilla <claudinha.rb at gmail.com>
>
> > Hello Gate Users,
> >
> >
> >
> > I was running a simulation with NCAT phantom and this error starts to
> > appear
> > using GATE 5. I usually used the same code in GATE 4 that any errors
> > appeared before.
> >
> > Does anybody know about the error bellow?
> >
> >
> >
> >
> >
> > ERROR - G4PhantomParameterisation::GetReplicaNo()
> >
> >        localPoint - (-1.743113937,-1.77535309,-1.503948302) - is outside
> > container solid: NCAT_S
> >
> >
> >
> > *** G4Exception : InvalidSetup
> >
> >      issued by : G4PhantomParameterisation::GetReplicaNo()
> >
> > Point outside voxels!
> >
> > *** Fatal Error In Argument *** core dump ***
> >
> >
> >
> > *** G4Exception: Aborting execution ***
> >
> > Aborted
> >
> >
> >
> >
> >
> > __________________________________
> >
> >
> >
> > Cláudia Régio Brambilla
> >
> >
> >
> > Física Médica
> >
> > Supervisora de Radioproteção - CNEN FM-0089
> >
> >
> >
> > Mestranda em Clínica Médica - FAMED/PUCRS
> >
> > Grupo de Pesquisa em Imagens Médicas - NIMed - PUCRS
> >
> > TECNOPUC 96A
> >
> >
> >
> > Contato:
> >
> >
> >
> > +55 51 84251368
> >
> > +55 51 3320 3682 ramal 7813
> >
> >
> >
> > _______________________________________________
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> >
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