[Gate-users] source angle type

[Simon Stute]

Hi Joon,

Display is just display, not very faithful ... Have you got the same results
in your root results (or other kind of output results) ??
I don't see any attenuation volume in your display, did you build some ??
Because the 'confine' macro command is usually used to fix an 'activity
volume' to a geometrical volume (assigned with a material) that is moving
during the simulation. You have defined some cylindrical shape activity
volume but in your display, its look like that it is a point source
'volume'. What is your complete macro file ?

Cheers,
Simon

2007/12/7, Joon Young Suk <joonyoung.suk at gmail.com>:
>
>
>
> Hi all,
> I am trying to simulate the scan with a cylindrical phantom which as two
> rod source inside.
> I built two rod sources with cylindrical geometry and set the angle type
> as "iso".
> I think the LORs should be randomly distributed through all 4pi angle, but
> the simulation doesn't look like that.
>
> From the display during the simulation, I can see most LORs are lying
> horizontally on the centre plane.
>
> Please check the image from the followed link :
>
> http://www.joonyoung.net/iso.jpg
>
> Also, here is my code for the source part.
>
> Please, let me know what should I do to correct it and make real isotropic
> emission.
>
> Thanks,
> Joon Young Suk
>
> # S O U R C E S
> /gate/source/addSource rodsource0
> ###################################################################
> /gate/source/rodsource0/setActivity {activity} becquerel
> /gate/source/rodsource0/setType backtoback
> /gate/source/rodsource0/gps/particle gamma
> /gate/source/rodsource0/gps/energytype Mono
> /gate/source/rodsource0/gps/monoenergy 0.511 MeV
> /gate/source/rodsource0/gps/type Volume
> /gate/source/rodsource0/gps/shape Cylinder
> /gate/source/rodsource0/gps/radius 0.5 mm
> /gate/source/rodsource0/gps/halfz 25.0 mm
> /gate/source/rodsource0/gps/centre {rod0Xposition} 0. 0. mm
> /gate/source/rodsource1/gps/angtype iso
> /gate/source/rodsource0/gps/confine rod0_P
>
> /gate/source/addSource rodsource1
> ###################################################################
> /gate/source/rodsource1/setActivity {activity} becquerel
> /gate/source/rodsource1/setType backtoback
> /gate/source/rodsource1/gps/particle gamma
> /gate/source/rodsource1/gps/energytype Mono
> /gate/source/rodsource1/gps/monoenergy 0.511 MeV
> /gate/source/rodsource1/gps/type Volume
> /gate/source/rodsource1/gps/shape Cylinder
> /gate/source/rodsource1/gps/radius 0.5 mm
> /gate/source/rodsource1/gps/halfz 25.0 mm
> /gate/source/rodsource1/gps/centre {rod1Xposition} 0. 0. mm
> /gate/source/rodsource1/gps/angtype iso
> /gate/source/rodsource1/gps/confine rod1_P
>
>
>
> Joon Young Suk
> Brain Research Centre
> Dept. of Physics,
> University of British Columbia
> 2211 Wesbrook Mall
> Vancouver, British Columbia
> Canada, V6T 2B5
>
> joon at physics.ubc.ca
> joonyoung.suk at gmail.com
>
> http://www.joonyoung.net
>
>
>
>
>
>
> _______________________________________________
> Gate-users mailing list
> Gate-users at lists.healthgrid.org
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>
>
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