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25 25
26 //GEANT4 - Depth-of-Interaction enabled Positr 26 //GEANT4 - Depth-of-Interaction enabled Positron emission tomography (PET) advanced example
27 27
28 //Authors and contributors 28 //Authors and contributors
29 29
30 // Author list to be updated, with names of co 30 // Author list to be updated, with names of co-authors and contributors from National Institute of Radiological Sciences (NIRS)
31 31
32 // Abdella M. Ahmed (1, 2), Andrew Chacon (1, 32 // Abdella M. Ahmed (1, 2), Andrew Chacon (1, 2), Harley Rutherford (1, 2),
33 // Hideaki Tashima (3), Go Akamatsu (3), Akram 33 // Hideaki Tashima (3), Go Akamatsu (3), Akram Mohammadi (3), Eiji Yoshida (3), Taiga Yamaya (3)
34 // Susanna Guatelli (2), and Mitra Safavi-Naei 34 // Susanna Guatelli (2), and Mitra Safavi-Naeini (1, 2)
35 35
36 // (1) Australian Nuclear Science and Technolo 36 // (1) Australian Nuclear Science and Technology Organisation, Australia
37 // (2) University of Wollongong, Australia 37 // (2) University of Wollongong, Australia
38 // (3) National Institute of Radiological Scie 38 // (3) National Institute of Radiological Sciences, Japan
39 39
40 40
41 #include "doiPETSteppingAction.hh" 41 #include "doiPETSteppingAction.hh"
42 #include "doiPETAnalysis.hh" 42 #include "doiPETAnalysis.hh"
43 #include "doiPETRun.hh" 43 #include "doiPETRun.hh"
44 #include "doiPETEventAction.hh" 44 #include "doiPETEventAction.hh"
45 45
46 #include "G4Step.hh" 46 #include "G4Step.hh"
47 #include "G4RunManager.hh" 47 #include "G4RunManager.hh"
48 #include "G4SteppingManager.hh" 48 #include "G4SteppingManager.hh"
49 49
50 #include "G4SystemOfUnits.hh" 50 #include "G4SystemOfUnits.hh"
51 #include "G4PhysicalConstants.hh" 51 #include "G4PhysicalConstants.hh"
52 #include <limits> 52 #include <limits>
53 53
54 ////////// Constructor /////////////////////// 54 ////////// Constructor //////////////////////////////////////////////
55 /*doiPETSteppingAction::doiPETSteppingAction() 55 /*doiPETSteppingAction::doiPETSteppingAction()
56 {;}*/ 56 {;}*/
57 doiPETSteppingAction::doiPETSteppingAction() 57 doiPETSteppingAction::doiPETSteppingAction()
58 : G4UserSteppingAction() 58 : G4UserSteppingAction()
59 { } 59 { }
60 60
61 ///////// Destructor ///////////////////////// 61 ///////// Destructor ////////////////////////////////////////////////
62 doiPETSteppingAction::~doiPETSteppingAction() 62 doiPETSteppingAction::~doiPETSteppingAction()
63 {;} 63 {;}
64 64
65 ///////// UserSteppingAction ///////////////// 65 ///////// UserSteppingAction ///////////////////////////////////////
66 void doiPETSteppingAction::UserSteppingAction( 66 void doiPETSteppingAction::UserSteppingAction(const G4Step* aStep)
67 { 67 {
68 doiPETRun* run = static_cast<doiPETRun*>(G4R 68 doiPETRun* run = static_cast<doiPETRun*>(G4RunManager::GetRunManager()->GetNonConstCurrentRun());
69 69
70 G4Track* track = aStep->GetTrack(); 70 G4Track* track = aStep->GetTrack();
71 G4String volumeName = aStep->GetPreStepPoint 71 G4String volumeName = aStep->GetPreStepPoint()->GetPhysicalVolume()->GetName();
72 G4double edep = aStep->GetTotalEnergyDeposit 72 G4double edep = aStep->GetTotalEnergyDeposit();
73 G4String processName =aStep->GetPostStepPoin 73 G4String processName =aStep->GetPostStepPoint()->GetProcessDefinedStep()->GetProcessName();
74 G4String particleName = track->GetDynamicPar 74 G4String particleName = track->GetDynamicParticle()->GetDefinition()->GetParticleName();
75 //G4int eventID = G4RunManager::GetRunManage 75 //G4int eventID = G4RunManager::GetRunManager()->GetCurrentEvent() -> GetEventID();
76 G4ThreeVector pos = track->GetPosition(); 76 G4ThreeVector pos = track->GetPosition();
77 77
78 78
79 //G4StepPoint* p2 = aStep->GetPostStepPoint( 79 //G4StepPoint* p2 = aStep->GetPostStepPoint();
80 G4StepPoint* p1 = aStep->GetPreStepPoint(); 80 G4StepPoint* p1 = aStep->GetPreStepPoint();
81 G4ThreeVector coord1 = p1->GetPosition(); 81 G4ThreeVector coord1 = p1->GetPosition();
82 82
83 //The following is to get the local position 83 //The following is to get the local position of the interaction with respect to the crystal block volume
84 const G4AffineTransform transformation = p1 84 const G4AffineTransform transformation = p1->GetTouchable()-> GetHistory()->GetTransform(2);
85 G4ThreeVector localPosition = transformation 85 G4ThreeVector localPosition = transformation.TransformPoint(coord1);
86 86
87 G4int blockID; 87 G4int blockID;
88 G4int crystalID; 88 G4int crystalID;
89 89
90 G4int scatterIndex = 0;//For checking 90 G4int scatterIndex = 0;//For checking
91 91
92 //If an event is created in a cold region or 92 //If an event is created in a cold region or outside the physical volume, then it will be killed.
93 if((volumeName != "phantom_physicalV" || vol 93 if((volumeName != "phantom_physicalV" || volumeName == "coldRegion_physicalV") && particleName== "e+"){
94 track->SetTrackStatus(fStopAndKill); 94 track->SetTrackStatus(fStopAndKill);
95 return; 95 return;
96 } 96 }
97 97
98 //Get the source position if the process nam 98 //Get the source position if the process name is annihilation
99 if(processName == "annihil" && volumeName==" 99 if(processName == "annihil" && volumeName=="phantom_physicalV"){
100 doiPETAnalysis::GetInstance()->SetSourcePo 100 doiPETAnalysis::GetInstance()->SetSourcePosition(pos);
101 run->SetAnnihilationTime((track->GetGlobal 101 run->SetAnnihilationTime((track->GetGlobalTime()));
102 } 102 }
103 103
104 //get event ID 104 //get event ID
105 //doiPETAnalysis::GetInstance()->SetEventID 105 //doiPETAnalysis::GetInstance()->SetEventID (eventID);
106 106
107 //Get scatter information in the phantom by 107 //Get scatter information in the phantom by the annihilation photon before detected by the detector. Note that the scatter index is initialized to 0.
108 //If there energy deposition in the phantom 108 //If there energy deposition in the phantom by the photon, then there is scatter, the index is 1, and if not it is 0.
109 if(edep > 0 && particleName == "gamma" && v 109 if(edep > 0 && particleName == "gamma" && volumeName == "phantom_physicalV"){
110 scatterIndex = 1; 110 scatterIndex = 1;
111 doiPETAnalysis::GetInstance()->SetScatterI 111 doiPETAnalysis::GetInstance()->SetScatterIndexInPhantom(scatterIndex);
112 } 112 }
113 113
114 /////////////////// Retrive (Extract) inf 114 /////////////////// Retrive (Extract) information in the crystal ///////////////////////////
115 if(edep>0. && volumeName=="Crystal_physicalV 115 if(edep>0. && volumeName=="Crystal_physicalV"){
116 116
117 //get the copy number of the block 117 //get the copy number of the block
118 blockID = aStep->GetPreStepPoint()->GetTou 118 blockID = aStep->GetPreStepPoint()->GetTouchableHandle()->GetCopyNumber(2);
119 119
120 //get the crystal copy number 120 //get the crystal copy number
121 crystalID = aStep->GetPreStepPoint()->GetT 121 crystalID = aStep->GetPreStepPoint()->GetTouchableHandle()->GetCopyNumber(0);
122 122
123 //G4cout<<localPosition.x()<<" "<<localPos 123 //G4cout<<localPosition.x()<<" "<<localPosition.y()<<" "<<localPosition.z()<<G4endl;
124 124
125 //get event ID 125 //get event ID
126 //doiPETAnalysis::GetInstance()->GetEventI 126 //doiPETAnalysis::GetInstance()->GetEventID (eventID);
127 127
128 //define a pointer for extracting informat 128 //define a pointer for extracting information
129 InteractionInformation* ExtractIntInfo = n 129 InteractionInformation* ExtractIntInfo = new InteractionInformation();
130 130
131 //get the energy deposition of each intera 131 //get the energy deposition of each interaction
132 ExtractIntInfo->SetEdep( edep ); 132 ExtractIntInfo->SetEdep( edep );
133 133
134 134
135 //get the blockID 135 //get the blockID
136 ExtractIntInfo->SetBlockNo( blockID ); 136 ExtractIntInfo->SetBlockNo( blockID );
137 137
138 138
139 //get the crystal ID 139 //get the crystal ID
140 ExtractIntInfo->SetCrystalNo( crystalID ); 140 ExtractIntInfo->SetCrystalNo( crystalID );
141 141
142 142
143 //get local position interaction in the cr 143 //get local position interaction in the crystal
144 ExtractIntInfo->SetInteractionPositionInCr 144 ExtractIntInfo->SetInteractionPositionInCrystal(localPosition);
145 145
146 //get the global time of the interaction w 146 //get the global time of the interaction with the crystal
147 ExtractIntInfo->SetGlobalTime( track->GetG 147 ExtractIntInfo->SetGlobalTime( track->GetGlobalTime());
148 148
149 //pass all the obtained information to the 149 //pass all the obtained information to the doiPETAnalysis class
150 //doiPETAnalysis::GetInstance()->GetIntrac 150 //doiPETAnalysis::GetInstance()->GetIntractionInfomation(ExtractIntInfo);
151 run->GetIntractionInfomation(ExtractIntInf 151 run->GetIntractionInfomation(ExtractIntInfo);
152 152
153 } 153 }
154 } 154 }
155 155