普通医用电子直线加速器机房开展调强适形放疗的可行性探讨  

Discussion of Feasibility to Carry out Intensity Modulated Radiation Therapy in Conventional Medical Electron Linear Accelerator Treatment Rooms.

作　　者：杨海友[1] 刘丽萍[1] 梁月琴[1] 张亮[1] 于水[1] 

机构地区：[1]国家生物医学分析中心,北京100850

出　　处：《中国辐射卫生》2010年第2期140-143,共4页Chinese Journal of Radiological Health

摘　　要：目的探讨现有普通医用电子直线加速器机房用于开展调强适形放疗(IMRT),其屏蔽效果的可行性。方法采用NCRP No.151报告《MV级X和γ射线放疗设备的屏蔽设计和评价》给出的MV级医用电子直线加速器机房周围环境辐射水平的估算模式,并结合实例的方式。结果普通医用电子直线加速器机房用于开展调强适形放疗后,其周围环境的辐射水平,工作人员的年受照剂量以及周围公众的年受照剂量场有不同程度的增加。结论需对拟开展强调适形放疗的普通电子直线加速器机房,进行环境影响评价,以论证其可行性。Objective To investigate the feasibility about the shielding effect of conventional mdical electron linear accelerator treatment in the existing rooms to carry out intensity modulated radiation therapy（IMRT）.Methods The estimation model given in NCRP REPORT No.151-＂Structural Shielding Design and Evaluation for Megavoltage X-and Gamma-Ray Radiotherapy Facilities＂ is adopted by linking instances,which presents the calculation methods on radiation level at the ambience of megavoltage medical electron linear accelerator treatment room.Results The radiation level,as well as the additinal annual effect dose of occupational and public at the ambience of accelerator treatment room,in crease to a certain extent,when convontional medical electron linear accelerator treatment room;are used to carry out IMRT.Conclusion It is necessary to make environmental impact assessment for conventional medical electron linear accelerator treatment rooms,which will be used to execute IMRT.

关 键 词：NCRPNo.151报告 普通医用电子直线加速器 调强适形放疗(IMRT) 估算模式 

分 类 号：R815[医药卫生—放射医学]