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None NaN values in energy dose deposit (dicom.out) for GeneralParticleSource in 4.9.6 

Forum: Medical Applications
Date: 09 May, 2014
From: <geant4president>

Hello there,

I've come across a problem (bug?) in GeneralParticleSource. When running the DICOM example of my 4.9.6p01 build with a GPS, a small spare of voxels will show a -nan value in the energy deposit "dicom.out" file. The amount of voxels with NaN depends on the actual number of shot gammas. The longer I simulate (in terms of total events in /run/beamOn) the more NaNs I get - of course because more voxels are hit, but the relative amount of nan voxels/total voxels is also increasing.

I just tested again with the original G4ParticleGun - no NaNs at all. Now, is there anybody out there who encountered the same problem? Is this a known bug in my release? Maybe one could test whether this is fixed in a more recent release by just using GPS and shooting 1e6 gammas with GPS on the phantom.

Any help highly appreciated - thanks!

Best, Markus

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