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None Re: 3-Dimensions Dosedistribution in Hadrontherapy. 

Forum: Medical Applications
Re: Question 3-Dimensions Dosedistribution in Hadrontherapy. (Jongseok)
Re: None Re: 3-Dimensions Dosedistribution in Hadrontherapy. (Santi Enrico Mazzaglia)
Re: Question Re: 3-Dimensions Dosedistribution in Hadrontherapy. (Jongseok)
Re: Idea Re: 3-Dimensions Dosedistribution in Hadrontherapy. (Santi Enrico Mazzaglia)
Date: 12 May, 2010
From: Santi Enrico Mazzaglia <Santi Enrico Mazzaglia>

Dear Jongseok,

I ran some simulations and I realized that the main contribution to the peak you've seen is due to the brass final collimator (search for "HadrontherapyBeamFinalCollimator" in the file src/PassiveProtonBeamLine.cc).

The contribution due to the PMMA stopper is much less clear, and in any case, at slightly lower energies.

In any case the advanced example is meant to simulate a beam energy around 60 MeV (and with a Gaussian profile).

If you want to use it in other cases, you must change it.

Hope this helsp, enrico

> the second peak is due to the protons that, at 200 MeV, can bypass the
> PMMA stopper for the diffused radiation (search for
> "HadrontherapyBeamNozzle" in file src/PassiveProtonBeamLine.cc).
> 
> Hope this helps, Enrico
> 
> > /beam/energy/meanEnergy 200 MeV /beam/energy/sigmaEnergy 500 keV
> > /beam/position/Xposition -2000 mm
> 

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