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25 //
26 //
27 // Author: Haegin Han
28 // Reference: ICRP Publication 145. Ann. ICRP 49(3), 2020.
29 // Geant4 Contributors: J. Allison and S. Guatelli
30 //
31
32 #include "TETDetectorConstruction.hh"
33
34 #include "G4VisAttributes.hh"
35
36 TETDetectorConstruction::TETDetectorConstruction(TETModelImport* _tetData)
37 :fWorldPhysical(nullptr), fContainer_logic(nullptr), fTetData(_tetData), fTetLogic(nullptr)
38 {
39 // initialisation of the variables for phantom information
40 fPhantomSize = fTetData -> GetPhantomSize();
41 fPhantomBoxMin = fTetData -> GetPhantomBoxMin();
42 fPhantomBoxMax = fTetData -> GetPhantomBoxMax();
43 fNOfTetrahedrons = fTetData -> GetNumTetrahedron();
44 }
45
46 TETDetectorConstruction::~TETDetectorConstruction()
47 {
48 delete fTetData;
49 }
50
51 G4VPhysicalVolume* TETDetectorConstruction::Construct()
52 {
53 SetupWorldGeometry();
54 ConstructPhantom();
55 PrintPhantomInformation();
56 return fWorldPhysical;
57 }
58
59 void TETDetectorConstruction::SetupWorldGeometry()
60 {
61 // Define the world box (size: 10*10*10 m3)
62 //
63 G4double worldXYZ = 10. * m;
64 G4Material* vacuum = G4NistManager::Instance()->FindOrBuildMaterial("G4_Galactic");
65
66 G4VSolid* worldSolid = new G4Box("worldSolid", worldXYZ/2, worldXYZ/2, worldXYZ/2);
67
68 auto* worldLogical = new G4LogicalVolume(worldSolid,vacuum,"worldLogical");
69
70 fWorldPhysical = new G4PVPlacement(nullptr,G4ThreeVector(), worldLogical,"worldPhysical", nullptr, false,0,false);
71
72 // Define the phantom container (10-cm margins from the bounding box of phantom)
73 //
74 auto* containerSolid = new G4Box("phantomBox", fPhantomSize.x()/2 + 10.*cm,
75 fPhantomSize.y()/2 + 10.*cm,
76 fPhantomSize.z()/2 + 10.*cm);
77
78 fContainer_logic = new G4LogicalVolume(containerSolid, vacuum, "phantomLogical");
79
80 new G4PVPlacement(nullptr, G4ThreeVector(), fContainer_logic, "PhantomPhysical",
81 worldLogical, false, 0);
82
83 fContainer_logic->SetOptimisation(TRUE);
84 fContainer_logic->SetSmartless( 0.5 ); // for optimization (default=2)
85 }
86
87 void TETDetectorConstruction::ConstructPhantom()
88 {
89 // Define the tetrahedral mesh phantom as a parameterised geometry
90 //
91 // solid and logical volume to be used for parameterised geometry
92 G4VSolid* tetraSolid = new G4Tet("TetSolid", G4ThreeVector(),
93 G4ThreeVector(1.*cm,0,0),
94 G4ThreeVector(0,1.*cm,0),
95 G4ThreeVector(0,0,1.*cm));
96
97 G4Material* vacuum = G4NistManager::Instance()->FindOrBuildMaterial("G4_Galactic");
98 fTetLogic = new G4LogicalVolume(tetraSolid, vacuum, "TetLogic");
99
100 // physical volume (phantom) constructed as parameterised geometry
101 new G4PVParameterised("wholePhantom",fTetLogic,fContainer_logic,
102 kUndefined, fTetData->GetNumTetrahedron(),
103 new TETParameterisation(fTetData));
104 }
105
106 void TETDetectorConstruction::ConstructSDandField()
107 {
108 // Define detector (Phantom SD) and scorer (eDep)
109 //
110 G4SDManager* pSDman = G4SDManager::GetSDMpointer();
111 G4String phantomSDname = "PhantomSD";
112
113 // MultiFunctional detector
114 auto* MFDet = new G4MultiFunctionalDetector(phantomSDname);
115 pSDman->AddNewDetector( MFDet );
116
117 // scorer for energy depositon in each organ
118 MFDet->RegisterPrimitive(new TETPSEnergyDeposit("eDep", fTetData));
119
120 // attach the detector to logical volume for parameterised geometry (phantom geometry)
121 SetSensitiveDetector(fTetLogic, MFDet);
122 }
123
124 void TETDetectorConstruction::PrintPhantomInformation()
125 {
126 // print brief information on the imported phantom
127 G4cout<< G4endl;
128 G4cout.precision(3);
129 G4cout<<" Phantom name "<<fTetData->GetPhantomName() << " TET phantom"<<G4endl;
130 G4cout<<" Phantom size "<<fPhantomSize.x()<<" * "<<fPhantomSize.y()<<" * "<<fPhantomSize.z()<<" mm3"<<G4endl;
131 G4cout<<" Phantom box position (min) "<<fPhantomBoxMin.x()<<" mm, "<<fPhantomBoxMin.y()<<" mm, "<<fPhantomBoxMin.z()<<" mm"<<G4endl;
132 G4cout<<" Phantom box position (max) "<<fPhantomBoxMax.x()<<" mm, "<<fPhantomBoxMax.y()<<" mm, "<<fPhantomBoxMax.z()<<" mm"<<G4endl;
133 G4cout<<" Number of tetrahedrons "<<fNOfTetrahedrons<<G4endl<<G4endl;
134 }
135