电子射野影像系统在放疗中的质量保证应用  

The Application of EPID in Radiotherapy's QA

作　　者：刘翔宇[1] 柳先锋[1] 尹文娟[1] 何亚男[1] 

机构地区：[1]重庆市肿瘤研究所放疗科,重庆400030

出　　处：《中国医学物理学杂志》2010年第5期2077-2079,共3页Chinese Journal of Medical Physics

摘　　要：目的:把电子影像射野系统(EPID)应用到放疗质量保证的多个方面,从而保障病人得到精确放疗。方法:根据不同目的采用EPID不同模式拍片,如单曝光,双曝光,开始-中途-结束,连续拍片等模式,将获得的图像与目的图像进行比较。结果:对于患者的正位和侧位图像能较好的控制摆位误差;能简洁快速地验证光野和射野一致性;能大概地验证治疗计划系统(TPS)中调强射野的注量图;能检验多叶准直器(MLC)的到位精度。结论:充分合理地利用EPID,可在放疗中进行多项质量保证,保证精确放疗。Objective：In order to get precise radiotherapy for patient,we apply EPID to various aspects of radiotherapy＇s QA.Methods：The images obtained according to different purposes using different film models of EPID,such as single exposure,double exposure,beginning-midway-end and continuous film models,will be compared with the objective images.Results：For orthotopic and lateral images of patients,we can control positioning error better;can quickly and succinctly verify the consistency of mitsuno and portal;can probably validate fluence map of intensity-modulated portal in treatment planning system（TPS）;can test the accuracy of multi-leaf collimator＇s place（MLC）.Conclusions：Fully and reasonably using of EPID can bring a lot of convenience at radiotherapy＇s QA,which to get precise radiotherapy.

关 键 词：电子射野影像系统 放疗 质量保证 

分 类 号：R811.1[医药卫生—放射医学]