IORTDetectorROGeometry.cc

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//
// This is the *BASIC* version of IORT, a Geant4-based application
//
// Main Authors: G.Russo(a,b), C.Casarino*(c), G.C. Candiano(c), G.A.P. Cirrone(d), F.Romano(d)
// Contributor Authors: S.Guatelli(e)
// Past Authors: G.Arnetta(c), S.E.Mazzaglia(d)
//    
//   (a) Fondazione Istituto San Raffaele G.Giglio, Cefalù, Italy
//   (b) IBFM-CNR , Segrate (Milano), Italy
//   (c) LATO (Laboratorio di Tecnologie Oncologiche), Cefalù, Italy
//   (d) Laboratori Nazionali del Sud of the INFN, Catania, Italy
//   (e) University of Wallongong, Australia
//
//   *Corresponding author, email to carlo.casarino@polooncologicocefalu.it

#include "IORTDetectorROGeometry.hh"
#include "IORTDummySD.hh"
#include "G4SystemOfUnits.hh"
#include "G4LogicalVolume.hh"
#include "G4VPhysicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4PVReplica.hh"
#include "G4Box.hh"
#include "G4ThreeVector.hh"
#include "G4Material.hh"

IORTDetectorROGeometry::IORTDetectorROGeometry(G4String aString, G4ThreeVector pos,
                                                                 G4double detectorDimX,
                                                                 G4double detectorDimY,
                                                                 G4double detectorDimZ,
                                                                 G4int numberOfVoxelsX,
                                                                 G4int numberOfVoxelsY,
                                                                 G4int numberOfVoxelsZ):
   
    G4VReadOutGeometry(aString),
    detectorToWorldPosition(pos),
    detectorSizeX(detectorDimX),
    detectorSizeY(detectorDimY),
    detectorSizeZ(detectorDimZ),
    numberOfVoxelsAlongX(numberOfVoxelsX),
    numberOfVoxelsAlongY(numberOfVoxelsY),
    numberOfVoxelsAlongZ(numberOfVoxelsZ)
{
}

IORTDetectorROGeometry::~IORTDetectorROGeometry()
{
}

G4VPhysicalVolume* IORTDetectorROGeometry::Build()
{
  // A dummy material is used to fill the volumes of the readout geometry.
  // (It will be allowed to set a NULL pointer in volumes of such virtual
  // division in future, since this material is irrelevant for tracking.)

  G4Material* dummyMat = new G4Material(name="dummyMat", 1., 1.*g/mole, 1.*g/cm3);

  G4double worldSizeX = 400.0 *cm;   // 200.0 *cm;
  G4double worldSizeY = 400.0 *cm;   // 200.0 *cm;
  G4double worldSizeZ = 400.0 *cm;   // 200.0 *cm;

  G4double halfDetectorSizeX = detectorSizeX;
  G4double halfDetectorSizeY = detectorSizeY;
  G4double halfDetectorSizeZ = detectorSizeZ;

  // World volume of ROGeometry ...
  G4Box* ROWorld = new G4Box("ROWorld",
                             worldSizeX,
                             worldSizeY,
                             worldSizeZ);
  
  G4LogicalVolume* ROWorldLog = new G4LogicalVolume(ROWorld, dummyMat, 
                                                    "ROWorldLog", 0,0,0);
  
  G4VPhysicalVolume* ROWorldPhys = new G4PVPlacement(0,G4ThreeVector(), 
                                                     "ROWorldPhys", 
                                                     ROWorldLog, 
                                                     0,false,0);

  // Detector ROGeometry 
  G4Box *RODetector = new G4Box("RODetector", 
                               halfDetectorSizeX, 
                               halfDetectorSizeY, 
                               halfDetectorSizeZ);

  G4LogicalVolume *RODetectorLog = new G4LogicalVolume(RODetector,
                                                       dummyMat,
                                                      "RODetectorLog",
                                                      0,0,0);
  
  G4VPhysicalVolume *RODetectorPhys = new G4PVPlacement(0,
                            detectorToWorldPosition,
                                                        "DetectorPhys",
                                                        RODetectorLog,
                                                        ROWorldPhys,
                                                        false,0);
  
  
  // Division along X axis: the detector is divided in slices along the X axis
  
  G4double halfXVoxelSizeX = halfDetectorSizeX/numberOfVoxelsAlongX;
  G4double halfXVoxelSizeY = halfDetectorSizeY;
  G4double halfXVoxelSizeZ = halfDetectorSizeZ;
  G4double voxelXThickness = 2*halfXVoxelSizeX;

  G4Box *RODetectorXDivision = new G4Box("RODetectorXDivision",
                                         halfXVoxelSizeX,
                                         halfXVoxelSizeY,
                                         halfXVoxelSizeZ);
  
  G4LogicalVolume *RODetectorXDivisionLog = new G4LogicalVolume(RODetectorXDivision,
                                                               dummyMat,
                                                               "RODetectorXDivisionLog",
                                                               0,0,0);

  G4VPhysicalVolume *RODetectorXDivisionPhys = new G4PVReplica("RODetectorXDivisionPhys",
                                                              RODetectorXDivisionLog,
                                                              RODetectorPhys,
                                                              kXAxis,
                                                              numberOfVoxelsAlongX,
                                                              voxelXThickness);

  // Division along Y axis: the slices along the X axis are divided along the Y axis

  G4double halfYVoxelSizeX = halfXVoxelSizeX;
  G4double halfYVoxelSizeY = halfDetectorSizeY/numberOfVoxelsAlongY;
  G4double halfYVoxelSizeZ = halfDetectorSizeZ;
  G4double voxelYThickness = 2*halfYVoxelSizeY;

  G4Box *RODetectorYDivision = new G4Box("RODetectorYDivision",
                                        halfYVoxelSizeX, 
                                        halfYVoxelSizeY,
                                        halfYVoxelSizeZ);

  G4LogicalVolume *RODetectorYDivisionLog = new G4LogicalVolume(RODetectorYDivision,
                                                               dummyMat,
                                                               "RODetectorYDivisionLog",
                                                               0,0,0);
 
  G4VPhysicalVolume *RODetectorYDivisionPhys = new G4PVReplica("RODetectorYDivisionPhys",
                                                              RODetectorYDivisionLog,
                                                              RODetectorXDivisionPhys,
                                                              kYAxis,
                                                              numberOfVoxelsAlongY,
                                                              voxelYThickness);
  
  // Division along Z axis: the slices along the Y axis are divided along the Z axis

  G4double halfZVoxelSizeX = halfXVoxelSizeX;
  G4double halfZVoxelSizeY = halfYVoxelSizeY;
  G4double halfZVoxelSizeZ = halfDetectorSizeZ/numberOfVoxelsAlongZ;
  G4double voxelZThickness = 2*halfZVoxelSizeZ;
 
  G4Box *RODetectorZDivision = new G4Box("RODetectorZDivision",
                                        halfZVoxelSizeX,
                                        halfZVoxelSizeY, 
                                        halfZVoxelSizeZ);
 
  G4LogicalVolume *RODetectorZDivisionLog = new G4LogicalVolume(RODetectorZDivision,
                                                               dummyMat,
                                                               "RODetectorZDivisionLog",
                                                               0,0,0);
 
  RODetectorZDivisionPhys = new G4PVReplica("RODetectorZDivisionPhys",
                                           RODetectorZDivisionLog,
                                           RODetectorYDivisionPhys,
                                           kZAxis,
                                           numberOfVoxelsAlongZ,
                                           voxelZThickness);

  IORTDummySD *dummySD = new IORTDummySD;
  RODetectorZDivisionLog -> SetSensitiveDetector(dummySD);

  return ROWorldPhys;
}