PET-CT诊断项目工作人员受照剂量及相关场所辐射水平测量与分析

目的 了解PET-CT诊断项目工作人员的受照剂量及相关场所的辐射水平，为降低工作人员受照剂量、完善PET-CT诊断项目放射防护措施提供科学依据。方法 依据国家相关标准，对PET-CT工作场所的周围剂量当量率、表面污染水平和人员受照剂量进行测量；根据相关检测结果与最大工作负荷对手部和眼部剂量进行估算。结果 三家医院PET-CT工作场所辐射水平（0.12~6.05 μSv/h）、β表面污染水平（本底~27.3 Bq/cm²）以及工作人员附加最大年有效剂量（1.58 mSv/a），符合国家标准规定的限值要求，其中一家医院的分装、注射护士手部最大年当量剂量（154 mSv/a）超出管理目标值（125 mSv/a）。结论 医院应建立针对性的防护措施，提高工作人员的辐射防护意识，降低工作人员所受附加剂量。

Measurement and analysis of radiation dose for staff and radiation level in related places in PET-CT diagnostic project

Objective To understand the radiation dose of staff in PET-CT diagnostic project and the radiation level in relevant places, and to provide scientific basis for reducing the radiation dose of staff and improving the radiation protection measures of PET-CT diagnostic project. Methods Measure the ambient dose equivalent rate around the workplace, the level of surface contamination and the exposure dose to workers in PET-CT workplaces according to relevant national standards, and estimate the hand and eye doses according to the relevant test results and the maximum workload. Results The radiation level (0.12~6.05 mSv/h) and beta surface contamination level (background~27.3 Bq/cm²) in PET-CT workplaces and the maximum annual effective dose (1.58 mSv/a) of staff in three hospitals meet the national standard limits, and the maximum annual equivalent dose (154 mSv/a) of the hand of the partitioned and injected nurses exceeds the management target value (125 mSv/a). Conclusion Hospitals should establish specific protective measures to raise staff's awareness of radiation protection and reduce additional doses to staff.