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Question Volume parameterization in DICOM example 

Forum: Medical Applications
Date: 12 Aug, 2013
From: George Dedes <George Dedes>

Hi,

I need some help while I am trying to figure out what is the problem when I implement two DICOM geometries read simultaneously in the DICOM example.

I am using RegularDetectorCosntruction. First of all, I don't find where from the the G4Material* DicomPhantomParameterisationColour::ComputeMaterial function is called.

Then, as far as I understand, the materials seem to be calculated within the DetectorConstruction class. So why is the ComputeMaterial needed?

Finally, when I put some G4cout statements in the ComputeMaterial, I see that it is called not only during initialization (and also twice, once in the very beginning and one after the physics is called and I get all the usual warnings about the HP neutron package), but also during the run, whenever a particle hits a voxel.

I initially supposed that the material calculation will take place during initialization and once the geometry is created it is frozen.

Any help is highly valuable as I am stuck. George

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