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目的提高基层医院放射治疗质量控制与质量保证水平。方法按照放射治疗的质量控制与质量保证的要求,采用0.6 cc指型电离室对直线加速器射野平坦度和对称性进行测量,并与三维水箱扫描的直线加速器射野平坦度和对称性进行对比。结果 0.6 cc指型电离室测量的直线加速器射野平坦度和对称性都满足不超过±3%的标准。结论对于基层医院来讲,作为肿瘤放射治疗质量控制与质量保证重要环节的射野平坦度和对称性的验证,0.6 cc指型电离室能够实现直线加速器射野平坦度和对称性的验证。
Objective To improve the quality control and quality assurance of radiotherapy in primary hospitals. Methods According to the requirements of quality control and quality assurance of radiotherapy, the flatness and symmetry of the linear accelerator were measured by 0.6 cc finger ionization chamber. The flatness and symmetry of the linear accelerator were compared . Results The flatness and symmetry of the linear accelerator measured by the 0.6 cc finger ionization chamber all satisfied the standard of ± 3%. Conclusion For the primary hospital, 0.6 cc finger ionization chamber can verify the field flatness and symmetry of the linear accelerator as a validation of field flatness and symmetry of tumor radiotherapy quality control and quality assurance.