G4VoxelLeftBreastROGeometry.cc

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// Authors: S. Guatelli and M. G. Pia, INFN Genova, Italy
// 
// Based on code developed by the undergraduate student G. Guerrieri 
// Note: this is a preliminary beta-version of the code; an improved 
// version will be distributed in the next Geant4 public release, compliant
// with the design in a forthcoming publication, and subject to a 
// design and code review.
//
#include "G4VoxelLeftBreastROGeometry.hh"

#include "G4SystemOfUnits.hh"
#include "G4HumanDummyLeftBreastSD.hh"
#include "G4LogicalVolume.hh"
#include "G4VPhysicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4PVReplica.hh"
#include "G4SDManager.hh"
#include "G4Box.hh"
#include "G4ThreeVector.hh"
#include "G4Material.hh"
#include "G4Tubs.hh"

G4VoxelLeftBreastROGeometry::G4VoxelLeftBreastROGeometry(G4String aString)
 : G4VReadOutGeometry(aString), ROvoxel_phys(0)
{
}

G4VoxelLeftBreastROGeometry::~G4VoxelLeftBreastROGeometry()
{
}

G4VPhysicalVolume* G4VoxelLeftBreastROGeometry::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 = 2.0*m;
  G4double worldSizeY = 2.0*m;
  G4double worldSizeZ = 2.0*m;

  // world volume of ROGeometry ...
  G4Box *ROWorld = new G4Box("ROWorld",
                 worldSizeX/2.,
                 worldSizeY/2.,
                 worldSizeZ/2.);

  G4LogicalVolume *ROWorldLog = new G4LogicalVolume(ROWorld,
                            dummyMat,
                            "ROWorldLog",
                            0,0,0);

  G4VPhysicalVolume *ROWorldPhys = new G4PVPlacement(0,
                             G4ThreeVector(),
                             "ROWorldPhys",
                             ROWorldLog,
                             0,false,0);
    
  // Breast Mother Volume
  G4double rmin = 0.* cm;
  G4double startPhi = 0.* degree;
  G4double spanningPhi = 180. * degree;
  G4double rmax = 5.5 *cm;
  G4double zz = 5. *cm;
  
  // RO geometry is defined for the inner tube of the breast
 
  G4Tubs* ROinnerLeftBreast = new G4Tubs("innerVoxelLeftBreast",
                   rmin, rmax,
                   zz/2., startPhi, spanningPhi);
  
  G4LogicalVolume* ROinnerLeftBreast_log = new G4LogicalVolume(ROinnerLeftBreast,
                            dummyMat,
                            "InnerLeftBreast",
                             0, 0, 0);
  G4RotationMatrix* matrix = new G4RotationMatrix();
  matrix -> rotateX(-90.* degree);
  matrix -> rotateY(180.* degree);
  matrix -> rotateZ(-18. * degree);


 G4VPhysicalVolume* ROphysInnerLeftBreast = new G4PVPlacement(matrix,
                              G4ThreeVector(10.*cm, 52.* cm, 8.7 *cm),
                       "physicalVoxelLeftBreast",
                   ROinnerLeftBreast_log,
                   ROWorldPhys,
                   false,
                   0);

  // Breast RO Geometry - slices along z axis
  G4double rmin_voxelz = 0.* cm;
  G4double rmax_voxelz = 5.5 * cm;
  G4double zz_voxels = 5. * cm;
  G4double startPhi_voxelz = 0.* degree;
  G4double spanningPhi_voxelz = 180. * degree; 
  G4int nslice = 10;

  G4Tubs* ROvoxelz = new G4Tubs("voxel_z", rmin_voxelz, rmax_voxelz, zz_voxels/(2*nslice),startPhi_voxelz, spanningPhi_voxelz);

  G4LogicalVolume* ROvoxelz_log = new G4LogicalVolume(ROvoxelz, dummyMat, "voxelz_log",0 , 0, 0);
  
  G4VPhysicalVolume* ROvoxelz_phys = new G4PVReplica("LinearArray", ROvoxelz_log, ROphysInnerLeftBreast,
                           kZAxis, nslice, zz_voxels/nslice);

  G4double voxel_height = (zz_voxels/nslice);
  
// Breast RO Geometry - slices along phi angle

  G4int n_voxels = 10;

  G4double voxel_phi = spanningPhi_voxelz/n_voxels;

 
  G4Tubs* ROvoxel = new G4Tubs("voxel", rmin_voxelz, rmax_voxelz, voxel_height/2.,
                 startPhi_voxelz,voxel_phi);
                 
  G4LogicalVolume* ROvoxel_log = new G4LogicalVolume(ROvoxel, dummyMat, "voxel_log", 0,0,0);

  ROvoxel_phys = new G4PVReplica("RZPhiSlices",
                  ROvoxel_log,
                 ROvoxelz_phys,
                 kPhi, n_voxels, voxel_phi,- (voxel_phi/2.)); 

  //delete matrix;
                          
  G4HumanDummyLeftBreastSD *dummySD = new G4HumanDummyLeftBreastSD;
  ROvoxel_log -> SetSensitiveDetector(dummySD);

  return ROWorldPhys;
}