Digital Coordinate Determination of 29 x 29 Scintillation Array Detector using Simulated LUT and MLPE

다국어 초록 (Multilingual Abstract)

In order to obtain the position of the scintillation pixel for the PET detector in digital coordinates, it goes through a complicated process. In this study, the location of the scintillation pixel was simply obtained as digital coordinates using the simulation look-up table and the maximum likelihood position estimation method. After configuring a 29 x 29 scintillation array detector using the DETECT2000 simulation tool, a gamma-ray interaction was generated at the center position of each scintillation pixel. The signal obtained from the photo sensor was reduced to 4channels using the Anger equation, and the average value and standard deviation of each channel were obtained, and a look-up table was created. In order to evaluate the accuracy of digital coordinate acquisition, gamma-ray interaction were generated at 0.03 mm intervals in the range of 0.01 mm to 2.98 mm in the Z-axis direction of all scintillation pixels. As a result, it showed an accuracy of 98%. If the results of this study are applied to a PET system, it will be possible to more conveniently obtain digital coordinate values.