Low Energy Linear Accelerator Room Shielding Protection Practice and Performance Analysis are Discussed
Objective:To provide a technical reference for the shielding protection transformation of linear accelerator room by discussing the practice of shielding protection transformation and measuring and analyzing the protection effect of low-energy linear accelerator room.Methods:Under the condition of 40cm×40cm irradiation field of Varian Turebeam linear accelerator,the dose rate of up to 600 cGy/min in the homogenization mode with the highest X-ray energy of 10MV and the maximum dose rate of 1400 cGy/min in the heterogeneous FFF mode of 6MV were used for irradiation,and the dose level at 30cm on the outer surface of the modified machine room was detected according to the requirements of the GBZ121-2020 standard and the prescribed methods of the"Requirements for Radiotherapy Radiological Protection".Standard limits are met.Results and Conclusion:Combined with the actual situation of the machine room and the protection requirements of the equipment,in addition to considering the economic cost,the influence of many factors such as building load-bearing,construction difficulty,space limitation and so on should be fully considered in the transformation process,so as to achieve the best protection effect and the most reasonable use demand with the smallest economic cost.
low energy linear accelerator roomshielding protection modificationconstruction schemesperformance analysis