Monte Carlo Simulation to Test the Effectiveness of Crystal Detector Length for PHITS-Based PET Modality

PET (Positron-emission tomography) is used to determine physiological and metabolic functions in the body. Monte Carlo simulation an important part of imaging, Particle Heavy Ion Transport code System (PHITS) a platform that can be perform simulations. This study uses based on PHITS range gamma absorption with energy 511 keV scintillation detector crystal material. The determines effective length modality. process carried out by shooting Gamma at various types materials, which are materials crystals. this NaI (Sodium Iodide), BaF2 (Barium Florida), BGO (Bismuth Germanate), GSO (Gadolinium Oxyorthosilicate), considering their atomic number density. material capable absorbing radiation detailed lengths for each 0.26 cm; 0.25 cm crystals; 0.1cm 0.18 from smaller than commercially available (range 1-3 cm). Based data, most crystal.