电子射野影像系统的质量保证及应用

Quality Assurance and Application of Electron Portal Imaging Device

目的详述电子影像射野系统(EPID)的质量保证和质量控制,让读者全面系统地掌握EPID质量保证和质量控制的方法;通过EPID在放射治疗中的应用,保障患者治疗的准确性,从而得到精确放疗。方法从EPID位置设置、EPID采集系统验证、门户剂量测定法选择验证、Iso Cal选项验证方面全面系统介绍EPID质量保证和质量控制的方法。从位置验证、剂量验证、加速器的常规质量保证工作方面介绍EPID在放射治疗中的应用。结果让读者了解了怎样全面系统地对EPID进行质量保证和质量控制;怎样利用EPID进行位置验证、剂量验证、加速器的常规质量保证工作。结论充分了解EPID的质量保证和质量控制方法,严谨的质量保证措施可以保证EPID功能的充分发挥,在放射治疗中合理利用EPID,可确保患者治疗的准确,使精确放射治疗有的放矢。

Objective Inorder to make readers clear what the quality assurance of Electron Portal Imaging Device（ EPID）is and how to make sure quality control. The quality assurance of EPID and the quality control were described in detail; To guarantee patients obtain accurate radiotherapy,we use EPID in the process of radiotherapy. Methods We introduce the quality assurance of EPID and the method of quality control thoroughly via the position setting of EPID,the verification of EPID system collection,the selection and verification of dose measurement method,and the verification of Iso Cal option. On the other side,we introduce the application of EPID in radiotheraopy by position verification,dose verification and conventional quality assurance. Results Readers can understand how to conduct EPID quality assurance and quality control; And how to use EPID to verify patient＇s position,to verify dose measurement and to do the regular quality assurance work. Conclusion completely understand the quality assurance of EPID and the method of quality control. Strict quality assurance measures can make full use of the function of EPID. By the use of EPID in radiotherapy,we can ensure that pateints gain precise treatments.