Abstract:

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   γ ray radiation dose rate was analyzed in 18 medical staff members during each medical procedure by using X and γ radiation detector. The estimation of annual exposure dose of 18 medical staff at different working site was based on the caculation of doserate(d), work time(t) and workload(w). Results   When the workloads were 1000, 4000, 7000 and 10000 per year, the annual doses 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. Conclusion   The staff receives higher radiation dose during dispensation and injection. When the workload is 4000 and 10000 per year, the dose received by hands and body would respectively exceed the national radiation safety standards (GBSS) on occupational annual dose limits.

Key words: Positron drug; Deoxyglucose(18F-FDG); PET; Radiation dosage; Radiation protection