《放射治疗机房的辐射屏蔽规范第2部分:电子直线加速器放射治疗机房》GBZ/T 201.2—2011标准评价结果分析——放射卫生技术服务机构相关人员

Analysis of the evaluation of Radiation Shielding Requirements for Radiotherapy Room—Prat 2:Radiotherapy Room of Electron Linear Accelerators(GBZ/T 201.2—2011):personnel in medical radiation technology service institutions

目的跟踪评价放射卫生技术服务机构相关人员对《放射治疗机房的辐射屏蔽规范第2部分:电子直线加速器放射治疗机房》GBZ/T 201.2—2011的实施过程中的科学性、适用性及可操作性等方面情况,为进一步完善该标准提供科学依据。方法采用WS/T 536—2017《卫生标准跟踪评价工作指南》和项目实施方案,从24个省份的放射卫生技术服务机构中随机选取了140名从事电子直线加速器机房防护检测与评价人员作为调查对象,通过预调查、现场调研、邮寄、电子邮件等方式开展调查,并收集数据进行分析。结果140名受访者完成了问卷调查(分布在98个辐射卫生服务机构,其中包括63个公共机构和77个民营机构)。86.68%的受访者声称对该标准有很好或非常好的理解,而只有64.3%的人参加过与该标准相关的培训。调查结果表明,工作人员对标准内容的掌握程度较低,在培训和传播方面的努力不足。尽管只有3.57%的受访者认为现有标准不适用于新的放射治疗设备和技术进步,但95.71%、93.57%和96.43%的受访者分别认为有必要增加断层治疗设备、CyberKnife系统和具有自屏蔽体的环形加速器的屏蔽计算示例。此外,65%的受访者认为10 MV X射线加速器室应考虑中子屏蔽。结论虽然该标准广泛用于放射治疗防护,但需要及时更新。同时标准文本涉及的技术性较强,不易掌握,应针对不同群体量身定制宣传目标,并加强对关键人员的培训,在全国范围内建立沟通合作机制,确保其实施效果达到统一。

Objective To track and evaluate the scientificity,applicability,and operability of the current implementation of the Radiation Shielding Specifications for Radiotherapy Treatment Rooms—Part 2:Radiotherapy Room of Electron Linear Accelerators(GBZ/T 201.2—2011)among personnel in medical radiation technology service institutions,and to provide scientific evidence for further improvement of the standard.Methods Following the Guidelines for Health Standards Tracking Evaluation Work(WS/T 536—2017)and the project implementation plan,a survey was conducted among 140 personnel engaged in shielding testing and evaluation of electron linear accelerator rooms in medical radiation technology service institutions from 24 provinces in China.The methods of pre-investigation,on-site research,mailing,and email were used to collect data for analysis.Results Questionnaires were completed by 140 respondents from 98 medical radiation service institutions,including 63 public institutions and 77 private institutions.Of the surveyed individuals,86.68%claimed to have a good or very good understanding of the standard,while only 64.3%had participated in training related to the standard.The survey indicated a low level of mastery of the standard content among the personnel and insufficient efforts in training and dissemination.Although only 3.57%of the respondents considered the existing standard to be inapplicable in the context of new radiotherapy equipment and technological advancements,95.71%,93.57%,and 96.43%believed that shielding calculation examples should be added for tomotherapy devices,CyberKnife systems,and ring accelerators with selfshielding bodies.Furthermore,65%of the respondents felt that neutron shielding should be considered for 10 MV X-ray accelerator rooms.Conclusion The GBZ/T 201.2—2011 has been widely used for radiation protection in radiotherapy.However,it is imperative to update this standard.Additionally,due to the technical complexity of the standard,it can be challenging for professionals to fully understand and implement it.Therefore,publicity goals should be tailored to different groups and the training of key personnel should be strengthened.A nationwide communication and cooperation mechanism should be established to ensure uniform implementation of the standard.