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Forum: Geometry
Re: Question G4PhantomParameterisation and daugther volumes (Guillaume Landry)
Date: 22 Jan, 2010
From: Pedro Arce <Pedro Arce>

Hi Guillaume,

As you realized it is not possible to include a volume in a voxelised phantom, because if you put it inside one voxel it will be replicated in all voxels. I have seen some works trying to solve this problem with some approximations, but the only one I know that provides an exact solution (navigating in both geometries: the phantom and the brachy seed at its correct position) is the work we presented at ESTRO 2009 (J. I. Lagares, P. Arce, M. D. S. Quintero, A. Cabrera, J. C. Mateos, M. Baeza, M. Herrador, "AN EASY-TO-USE FRAMEWORK FOR BRACHYTHERAPY MC DOSE CALCULATIONS, WITH SEED IDENTIFICATION AND REAL SEED GEOMETRY", Radiotherapy and Oncology, vol. 2, supp. 1, August 2009). You can get the code to do this in GAMOS (http://geant4.cern.ch -> Applications -> Medical -> GAMOS). In the GAMOS user's guide it is explained how to use this feature, and there is an example in tutorials/RTTutorial/exercise5/exercise5b.in

Pedro

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1 Question: Re: G4PhantomParameterisation and daugther volumes   (Guillaume Landry - 04 Feb, 2010)
(_ Feedback: Re: G4PhantomParameterisation and daugther volumes   (Pedro Arce - 04 Feb, 2010)
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