ABSTRACT
摘要
ACKNOWLEDGEMENTS
INTRODUCTION
CHAPTER 1 DIGITAL IMAGING DETECTORS
Introduction
1.1- Imaging Techniques
1.2- Definitions
1.2.1- Linear Arrays
1.2.2- Direct and Indirect Conversion
1.3- Anatomy of Detector
1.3.1- Scintillators
1.3.2- Photodiode Arrays and CCD Arrays
1.3.3- Detector Front-End
1.3.4- Data Acquisition System
1.3.5- Control Unit
1.3.6- Mechanics
1.3.7- Power Supply
1.3.8- Accessories
1.3.9- Frame Grabber Card
1.3.10- Soflware
1.4- Detector Properties and Performance Characteristic
1.4.1- Spatial Resolution
1.4.2- Dynamic Range
1.4.3- Normalization
1.4.4- Scanning Speed
1.4.5- Quantum Efficiency
1.5- Design Differences for Different Radiation Sources
References
CHAPTER2 PLASTIC SCINTILLATING FIBER
Introduction
2.1- Optical Properties of the Fiber
2.1.1 Fundamentals of light propagation in light guides
2.1.2- Total internal reflection
2.1.3- Numerical aperture of a light guide
2.2- Scintillating Fibers
2.3- Typical Round Scintillating Fiber
2.3.1- General description
2.3.2- Optical and physical properties
References
CHAPTER 3- RADIATION IMAGING CONCEPTS
Introduction
3.1- DQE as Quantum Efficiency of Imaging Detectors
3.1.1- The Quasi-ideal Imaging Detector
3.1.2- The Real Imaging Detector
3.1.3- The DQE in the Frequency-Domain
3.1.4- Detection Efficiency(DE) of Scintillating Fiber
3.2- MTF or Modulation Transfer Function of Imaging System
3.3- Noise
References
CHAPTER 4- GEANT4 SIMULATION TOOLKIT
Introduction
4.1- Common Features of Geant4 Low Energy Electromagnetic Processes
4.1.1- Generalities
4.1.2- Calculation of Total Cross Sections
4.2- Interactions
4.2.1- Compton Scattering
4.2.2- Rayleigh Effect
4.2.3- Photoelectric Effect
4.2.4- Bremsstrahlung
4.2.5- Ionization
4.3- Software Implementation
4.4-Geant4 Architecture
References
CHAPTER 5- PSF's PERFORMANCE AS AN IMAGING DETECTOR
Introduction
5.1- Modeling of the Detector
5.1.1- General Considerations
5.1.2- Detector Design and Experiment setup
5.2- Simulation of the Detector
5.2.1 - Scintillation Characteristic of the Single PSF
5.2.2- Linear PSF Array
5.2.3- Simulation of Tomography and Radiography experiment
5.3- CT scan and Radiography Experiment
5.3.1- Imaging Experiment by Using Single Scintillating Fiber
5.3.2- Imaging Experiment by Using 2D Scintillating Fiber Array
5.3.3- What is next?
References
APPENDIX A- Geant4 C++ Programming for Simulation of PSF Detector and CT Scan Experiment
APPENDIX B- X-ray Computed Tomography
