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http://dx.doi.org/10.7742/jksr.2018.12.7.929

Monte-carlo Simulation for X-ray Photon Counting using MPPC Arrays  

Lee, Seung-Jae (Department of Radiological Science, Dongseo University)
Baek, Cheol-Ha (Department of Radiological Science, Kangwon National University)
Publication Information
Journal of the Korean Society of Radiology / v.12, no.7, 2018 , pp. 929-934 More about this Journal
Abstract
Studies for counting and detecting X-rays for the improvement of image quality and material analysis are active. In this work, the detector for X-ray photon counting was designed using Multi-pixel photon counter (MPPC) array and the detector characteristics were evaluated through simulation. Geant4 Application for Tomographic Emission (GATE) was used to obtain the position where the X-ray and the scintillation interacted, and this position was used as the light generation position of DETECT2000. 0.5 mm and 1 mm thick Gadolinium Aluminium Gallium Garnet (GAGG) scintillators were used and the light generated through a $4{\times}4$ array of MPPCs was acquired. The spatial resolution of the designed detector was evaluated by reconstructed image using the light signal acquired for each channel. We obtained images of more than 2 lp/mm in both 0.5 mm and 1 mm thick GAGG scintillation. When this detector is used in a X-ray system, a low-cost system capable of photon counting can be made.
Keywords
Photon counting; Monte-carlo simulation; MPPC;
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