Hi
I am trying to calculate PDD using Geant4
I divided a water phantom to voxels (2 mm x 2mm x 2 mm) by G4NestedParameterisation and i have created a class derived from Sensitive Detector class using Hit (I am not sure that this sensitive detector must be used)
How can I calculate the dose at each voxel?
Dear @Keyvan Tabaei,
To calculate PDD using a voxelized geometry, you need first to create you own SensitiveDetector class derived from the Geant4 class G4VSensitiveDetector, and assign this object to your geometry. In this class (SensitiveDetector) you have a virtual method called ProcessHits(G4Step*, G4TouchableHistory* ) in which you can accumulate the dose deposition (dE/dm).
I suggest you to see in details the source code of the project medical_linac in your geant4 example folder ($Geant4-install-folder/share/Geant4-vx.x/examples/advanced/medical_linac/).
Dear Zakaria Aboulbanine
Thank you for your help, I appreciate it
As I had told, I used Sensitive Detector and G4NestedParameterisation, but I didn't know how to find out that in which voxel the energy has been deposited during each step.
Finally, I found I must use Replica Number to identify the voxel.
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