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| Discussion of Feasibility to Carry out Intensity Modulated Radiation Therapy in Conventional Medical Electron Linear Accelerator Treatment Rooms |
| YANG Hai-you, LIU Li-ping, LIANG Yue-qin, et al |
| National Center of Biomedical Analysis, Beijing 100850 China |
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Abstract 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.
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Received: 17 October 2009
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