Mobetron 2000移动式术中放疗系统的物理性能测试

Physical performance testing of Mobetron 2000 mobile intraoperative radiotherapy system

目的:对Mobetron 2000移动式术中放疗系统进行物理性能测试,以确保应用的可靠性。方法 :按照TG51协议所推荐的方法,测量Mobetron 2000移动式术中放疗系统的百分深度剂量(percent depth dose,PDD)、输出剂量、射束能量、射野的平坦度与对称性、X线污染及剂量线性和重复性等。测量时都使用三维水箱进行测试验收,限光筒端面始终保持与水面相切,且标称源皮距为50 cm。结果:除12 Me V射束能量外,该系统的其他指标均符合标准要求,可以确保稳定运行。结论:该系统可以应用于临床,为患者提供安全、可靠及有效的治疗。

Objective To execute physical performance testing of Mobetron 2000 mobile intraoperative radiotherapy system.Methods Mobetron 2000 mobile intraoperative radiotherapy system had its indexes measured according to TG51 protocol such as percent depth dose(PDD), output dose, beam energy, field flatness and symmetry, X-ray pollution, dose linearity and repeatability. Three-dimensional water phantom was used for verification and acceptance when the measurement was executed, while the calimator end was tangent to the water surface and the nominal ource-skin distance was 50 cm. Results All the indexes of the system met the desired requirements except 12 Me V beam energy. Conclusion The system can be promoted clinically for safe, reliable and efficient treatment.