Radiation dosimetry in <SUP>68</SUP>Ga-PSMA PET/CT prostate imaging

During Gallium Ga-68-PSMA PET prostate imaging, the kidneys and liver tissue is the uptake amount of radioactive. The doses in the critical organs should be well determined due to the toxic effects of radiation exposure on the human body. The absorbed dose distribution in the liver and kidneys for Ga-68 activity data and absorbed dose values were calculated using Phantom TLD, Monte Carlo EGSnrc, and the IDAC Dose software for the TLD settings. It was calculated that 1.3E-2 mGy/MBq and 3E-1 mGy/MBq in the Phantom TLD, 0.7E-2 mGy/MBq, and 4.5E-2 mGy/MBq in the IDAC Dose, and 0.8E-1 mGy/MBq and 0.9E-2 mGy/MBq in the EGSnrc simulation for dose per unit activity in MBq.