^(131)I核素治疗操作方式修正因子对辐射安全风险的影响

Effect of^(131)I nuclide therapy operation mode correction on radiation safety risk

为更好地保障碘-131(^(131)I)核素治疗工作人员的职业健康与安全,提高^(131)I核素治疗的使用率,选择深圳市10家医院的^(131)I核素治疗工作场所为研究对象开展研究。采用碘盒滤膜采样法,通过低本底高纯锗γ能谱仪和无源效率刻度软件,测量核医学工作场所关键区域中^(131)I的活度浓度。估算职业人员待积有效剂量,评估职业人员辐射安全风险,进而探讨^(131)I核素治疗操作方式修正因子变更对职业人员辐射安全风险的影响。结果表明:采用厂家配送和自动分装方式的核医学工作场所中,^(131)I(液态)核素治疗操作方式修正因子设定为10时,带来的辐射安全风险仍远低于标准限值;建议将^(131)I(液态)核素治疗操作方式修正因子按分装方式进行区分,手动分装设定为1,厂家配送和自动分装方式设定为10。

To protect the occupational health and safety of^(131)I nuclear therapy workers and increase the utilization rate of^(131)I nuclear therapy,^(131)I nuclear therapy workplaces in 10 hospitals in Shenzhen were selected in this study.The iodine box filter membrane sampling method,combined with a low background high-purity germaniumγenergy spectrometer and passive efficiency calibration software,was used to measure the^(131)I activity concentration in critical areas of nuclear medicine workplaces.The accumulated effective dose of occupational personnel was estimated,and then the radiation safety risk of occupational personnel was evaluated.Furthermore,the effect of the correction factor change of^(131)I nuclide treatment operation on the radiation safety risk of occupational personnel was analyzed.The results showed that when the correction factor of^(131)I(liquid)nuclide treatment operation mode was set to 10,the radiation safety risk was far below the standard limit for manufacturer delivery and automatic packaging in nuclear medicine workplaces.It was recommended that the correction factor of the operation model of^(131)I(liquid)radionuclide therapy be distinguished by the packaging system,with manual packaging set to 1 and manufacturer delivery and automatic packaging set to 10.