Abstract: The PET/CT center used ¹⁸F-FDG as a positron diagnostic drug to investigate the radiation level of the center. It provided a reference for clinical radiation protection. Radiation dose rate of each working area was measured by radiation dose rate meter. Personal annual effective dose was monitored by thermoluminescent dosimeter, and the radiation dose rate at different distances from examinees was studied. It was found that the radiation dose rate of working area and staff in PET/CT center met the national standard. The radiation dose rate was close to the environmental background beyond 3 m away from the examinee.

Key words: PET/CT, radiation protection, occupational radiation, nuclear medicine