[Gate-users] comparison between mathematical and voxelized geometry

[Yann PERROT]

Hi Sophie,

Did you try to check the energy conservation with particles totally 
absorbed in the water tank (e.g. 5 keV electrons) ?

Yann

Le 22/05/2013 12:19, Chiavassa Sophie a écrit :
>
> Hi,
>
> I performed two simple simulations (see main.mac):
>
> -Spherical monoenergetic source of photons (50 keV) in a water tank 
> (20x20x20 cm)
>
> -Dose actor Volume attached to the water tank and a resolution of 
> 100 100 100 (voxel size = 2x2x2 mm3)
>
> -Same physic.mac (see physics.mac) and same number of particles
>
> §Simulation1 = mathematical water tank (box)
>
> §Simulation 2 = voxelized water tank (image analyse)
>
> Relative results are identical (relative-comparison.jpg) but absolute 
> results present significant discrepancies (absolute-comparison.jpg), 
> although the number of initial particles is the same for the two 
> simulations.
>
> Someone could explain that ?
>
> Thanks
>
> *Sophie Chiavassa*
>
> *Radiophysicienne***
>
> *Service de physique médicale*
>
> *Centre de Lutte Contre le Cancer Nantes Atlantiques -- *
>
> *René Gauducheau*
>
> *Site Hospitalier Nord Bd J. Monod*
>
> *44805 ST HERBLAIN CEDEX*
>
> *0240679963*
>
> ***cid:193052914 at 09082012-3151*
>
>
>
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