한국의학물리학회:학술대회논문집 (Proceedings of the Korean Society of Medical Physics Conference)
- 한국의학물리학회 2003년도 제27회 추계학술대회
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- Pages.44-44
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- 2003
Optimization of Dual Layer Phoswich Detector for Small Animal PET using Monte Carlo Simulation
- Y.H. Chung (Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea Advanced Institute of Science and Technology) ;
- Park, Y. (Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
- G. Cho (Korea Advanced Institute of Science and Technology) ;
- Y.S. Choe (Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
- Lee, K.H. (Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
- Kim, S.E. (Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
- Kim, B.T. (Samsung Medical Center, Sungkyunkwan University School of Medicine)
- 발행 : 2003.09.01
초록
As a basic measurement tool in the areas of animal models of human disease, gene expression and therapy, and drug discovery and development, small animal PET imaging is being used increasingly. An ideal small animal PET should have high sensitivity and high and uniform resolution across the field of view to achieve high image quality. However, the combination of long narrow pixellated crystal array and small ring diameter of small animal PET leads to the degradation of spatial resolution for the source located at off center. This degradation of resolution can be improved by determining the depth of interaction (DOI) in the crystal and by taking into account the information in sorting the coincident events. Among a number of 001 identification schemes, dual layer phsowich detector has been widely investigated by many research groups due to its practicability and effectiveness on extracting DOI information. However, the effects of each crystal length composing dual layer phoswich detector on DOI measurements and image qualities were not fully characterized. In order to minimize the DOI effect, the length of each layer of phoswich detector should be optimized. The aim of this study was to perform simulations using a simulation tool, GATE to design the optimum lengths of crystals composing a dual layer phoswich detector. The simulated small PET system employed LSO front layer LuYAP back layer phoswich detector modules and the module consisted of 8
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