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Question 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)
Date: 08 May, 2010
From: Jongseok <Jongseok>

As you said, I sum all of z values on x-y plann.

So, I got a graph like this attached file(100000_200MeV_0.01mm_3D.jpg)

You can see that this graph has two peaks.

In the case of typical bragg peak, it has only one specific peak point.

Also, when I sum all of y, z values on x-axis,

I found the same situation(Please see second attached file).

I can't understand why it has two peaks.

Some variables can affect bragg peak?

PS: When I use default setting of Hadrontherapy, I got a normal bragg peak.

My setting value is the below:

Phantom and detector size: 40cm 40cm 40cm Voxel size(x,y,z): 2mm

phantomPosition(20.*cm, 0.*cm, 0.*cm) detectorToPhantomPosition(0.*cm,0.*cm,0.*cm)

/beam/energy/meanEnergy 200 MeV /beam/energy/sigmaEnergy 500 keV /beam/position/Xposition -2000 mm

/physic/setCuts 0.01 mm /Step/waterPhantomStepMax 0.01 mm /gun/particle proton

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2010/05/08/11.17-16284-0000_200MeV_0.01mm_3D.JPG
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2010/05/08/11.17-107-00_200MeV_0.01mm_1D_X.JPG

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1 Idea: Re: 3-Dimensions Dosedistribution in Hadrontherapy.   (Santi Enrico Mazzaglia - 12 May, 2010)
(_ None: Re: 3-Dimensions Dosedistribution in Hadrontherapy.   (Santi Enrico Mazzaglia - 12 May, 2010)
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