论文部分内容阅读
目的:利用带有电子射野影像装置(Electronic Portal Imagine Device,EPIDs)的Elekta-iViewGT系统对灯光野与射线野的一致性进行验证,以替代传统的手段,更可以达到节省人力物力和时间。方法:在加速器的能量为4MV,8MV,15MV光子线,在治疗模式卜,剂量为40MU;分别以Elekta-iViewCTTM系统和剂量胶片法跟踪测量每个实验点的光野和射野重合度的改变。记录每个测量点的数据,分析灯光野与射线野的一致性的变化和比较两种力法之间的误差程度。结果:Elekta-iViewGTTM系统得出的数据和剂量胶片法分析取得的灯光野与射线野的一致性的参数之间误差比较不大于0.20mm。结论:可以利用Elekta-iViewGT系统对设备的灯光野与射线野的一致性验证,而且是较准确、有效、可靠和操作简单快捷以及数字化图像质量高、直观,替代传统的测验手段。
OBJECTIVE: To verify the consistency between light field and radiation field by using the Elekta-iViewGT system with Electronic Portal Imagine Device (EPIDs) to replace the traditional methods and to save manpower, material and time. Methods: The energy of the accelerator was 4MV, 8MV and 15MV photons. In the treatment mode, the dose was 40MU. The changes of the coincidence degree of the light field and the field of each experimental point were measured by Elekta-iViewCTTM system and dose film method respectively. Record the data of each measuring point, analyze the change of the consistency between light field and ray field, and compare the degree of error between the two force methods. Results: The error between the data obtained by the Elekta-iViewGTTM system and the parameters of the consistency of the light field and the radiation field obtained by the analysis of the film method was not more than 0.20 mm. Conclusion: The Elekta-iViewGT system can be used to verify the consistency of equipment’s light field and radiation field, and it is more accurate, effective, reliable and easy to operate, as well as digital image quality is high, intuitive and alternative to traditional test methods.