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Question Slow tracking in voxelized phantom 

Forum: Event and Track Management
Date: 29 Sep, 2009
From: Jorge Cabello <Jorge Cabello>

Hi, my specific application is mammography and I am trying to simulate a voxelized phantom (over 5 10^6 voxels) in a typical mammography setup. As expected, tracking of X-ray photons is incredibly slow in this phantom. I have read that this problem is due to the fact that when particles are close to a boundary it has to recalculate the path length with high accuracy, therefore, for a voxelized phantom, it is recalculating the path length continuously. I am aware that this problem is being investigated for applications using GATE by checking if the next voxel is of the same material, thus the boundary is not considered, but I haven't found anything for Geant4. Can anybody hint me where to look at? Thanks Jorge

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1 Feedback: Re: Slow tracking in voxelized phantom   (Pedro Arce - 29 Sep, 2009)
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