二维电离室矩阵在加速器日常质量保证中的应用与研究

目的:探讨应用二维电离室矩阵在加速器日常质量保证中的可行性。方法:使用二维电离室矩阵分别测量加速器的照射野与灯光野的重合性、等中心、照射野的对称性及平坦度、楔形板角度等。结果:加速器的照射野与灯光野的重合性、等中心、照射野的对称性及平坦度、楔形板角度等测量结果均在允许范围内,符合临床要求。结论:二维电离室矩阵可用于加速器日常质量保证的测量,是放疗设备日常质量控制的理想工具。

Application and Research of Two-dimensional Ion Chamber Array in Daily Quality Assurance of Accelerator

Objective： To discuss the feasibility of two-dimensional ion chamber array in daily quality assurance of accelera- tor. Methods： Use two-dimensional ion chamber array to measure the overlaps and isocentre character of accelerator＇s radia- tion field and light field, the symmetry and flatness of radiation field, the wedge angle. Results： All the measure results were within bounds and satisfied the demand of clinical application. Conclusions： The two-dimensional ion chamber array can be used in measurement of daily quality assurance of accelerator. It is an ideal tool for daily quality controlment of radiotherapy equipment.