Evaluation of personal radiation dose of worker in cyclotron center and PET-CT department

Objective: To measure and evaluate the personal radiation dose for medical staff in Cyclotron center and PET-CT department and to offer the reference data for clinical radiation protection. Methods: ã ray radiation dose rate was analyzed in 18 medical staff members during each medical procedure by using X and ã radiation detector. Then the mean dose per medical procedure and the assuming annual dose at different working sites were calculated by the doserate, work time and workload. Results: When the workload were 1000, 4000,7000 and 10000 per year, the annual dose of per procedure were: 0.27 mSv for quality control; 0.02 to 0.20 mSv for dispensation; 0.06 to 0.58 mSv for carrying the compound; 2.49 to 24.9 mSv for injection and 1.19 to 11.91 mSv for setting the patients. Conclusions: The stuff who received higher radiation dose during working were carried dispensation and injection. When the workload were 4000 and 10000 per year, the dose received by hands and body respectively would exceed the national radiation safety standards (GBSS) on occupational annual dose limits.