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geant4/examples/extended/medical/DICOM/src/DicomPrimaryGeneratorAction.cc
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2020-12-04 12:30:43 +01:00

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//
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//
/// \file medical/DICOM/src/DicomPrimaryGeneratorAction.cc
/// \brief Implementation of the DicomPrimaryGeneratorAction class
//
// The code was written by :
// *Louis Archambault louis.archambault@phy.ulaval.ca,
// *Luc Beaulieu beaulieu@phy.ulaval.ca
// +Vincent Hubert-Tremblay at tigre.2@sympatico.ca
//
//
// *Centre Hospitalier Universitaire de Quebec (CHUQ),
// Hotel-Dieu de Quebec, departement de Radio-oncologie
// 11 cote du palais. Quebec, QC, Canada, G1R 2J6
// tel (418) 525-4444 #6720
// fax (418) 691 5268
//
// + Université Laval, Québec (QC) Canada
//*******************************************************
#include "DicomPrimaryGeneratorAction.hh"
#include "G4Event.hh"
#include "G4ParticleGun.hh"
#include "G4ParticleTable.hh"
#include "DicomRegularDetectorConstruction.hh"
#include "G4ParticleDefinition.hh"
#include "G4SystemOfUnits.hh"
#include "Randomize.hh"
#include "CLHEP/Random/RandFlat.h"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
DicomPrimaryGeneratorAction::DicomPrimaryGeneratorAction()
: G4VUserPrimaryGeneratorAction(),
fParticleGun(0)
{
G4int nParticle = 1;
fParticleGun = new G4ParticleGun(nParticle);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
DicomPrimaryGeneratorAction::~DicomPrimaryGeneratorAction()
{
delete fParticleGun;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DicomPrimaryGeneratorAction::GeneratePrimaries(G4Event *anEvent)
{
G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
G4String particleName;
G4ParticleDefinition* particle
= particleTable->FindParticle(particleName="e-");
fParticleGun->SetParticleDefinition(particle);
// put the e- in the x direction of the patient (z in the accelerator axs)
// to hit patient in the central slice of the phantom
G4ThreeVector dir(0,0,1);
//G4ThreeVector dir(2.*CLHEP::RandFlat::shoot()-1.,
//2.*CLHEP::RandFlat::shoot()-1.,-CLHEP::RandFlat::shoot());
dir /= dir.mag();
fParticleGun->SetParticleMomentumDirection(dir);
fParticleGun->SetParticleEnergy(100.*MeV);
//put it at SAD = 1 m on xy plane of central slice
fParticleGun->SetParticlePosition(G4ThreeVector(0.,0.,-120.));
//fParticleGun->SetParticlePosition(G4ThreeVector(0.,0.,-22.));
fParticleGun->GeneratePrimaryVertex(anEvent);
}