一台陀螺式钴-60立体放射治疗系统放射防护评价

A Gyro Type Cobalt 60 Three-Dimensional Radiotherapy on Radiological Protection Evaluation System

目的探讨陀螺式钴-60立体放射治疗系统产生的轫致辐射的屏蔽及对环境的影响。方法以一台陀螺式钴-60立体放射治疗系统为例,运用剂量估算法进行屏蔽防护设计及核实。结果依据陀螺式钴-60立体放射治疗系统运行上限参数,对射线初级和次级屏蔽层以及加速器防护门的屏蔽能力等进行估算和分析。机房的相应屏蔽层厚度设计可以满足防护设计要求。结论建设此类设施,只要加强辐射防护,陀螺式钴-60立体放射治疗系统产生的轫致辐射对周围环境的影响是可接受的。

Objective To explore the gyro type cobalt-60 three-dimensional radiotherapy system to produce the bremsstrahlung radiation shielding and the impact on the environment.Methods Taking a gyro cobalt-60 three-dimensional radiotherapy system as an example.The dose estimation is used for shielding protection design and verification.Results Based on gyro cobalt-60 three-dimensional radiotherapy system running limit parameters,the radiation shielding layer and primary and secondary accelerator shield shielding ability and so on are calculated and analyzed.Computer room of the corresponding protective shielding layer thickness design can meet the design requirements.Conclusion The construction of such facilities,as long as the strengthening of radiation protection,gyro type cobalt-60 three-dimensional radiotherapy system to produce the bremsstrahlung influence to the surrounding environment is acceptable.