基于SPSS软件分析医用电子直线加速器输出剂量稳定性  

Statistic Analysis of Output Stability for Medical Linear Accelerator

作　　者：姜瑞瑶[1] 王忆冰[1] 

机构地区：[1]上海交通大学附属第六人民医院医学装备处,上海200233

出　　处：《医疗卫生装备》2012年第5期118-119,共2页Chinese Medical Equipment Journal

摘　　要：目的:分析了西门子Oncor Impression医用直线加速器4个能量挡(6 MeV,15 MeV,6 MV,15 MV)的输出剂量稳定性。方法:用SPSS软件通过Kolmogorov-Smirnov和Kruskal-Wallis法分别对2009年一整年的晨检输出剂量进行分析,得出正态性与显著性差异的结果。结果:4挡能量中的3档能量(6 MeV,15 MeV,15 MV)符合正态分布,同时6 MeV、15 MeV 2挡电子线以及6 MV、15 MV 2挡X射线无显著性差异。结论:不同能量的X射线或电子线的输出剂量误差之间有一定的内在联系,因此如果物理师发现加速器输出剂量误差超过限度时,不仅需要关注被检测能量输出剂量的大小,其他相关能量的输出剂量也应该被严格检测,以保证患者的治疗质量。Objective To analyze the output stability of Siemens Oncor Impression medical linear accelerator by testing the normality and significant difference of all the 4 energies（6 MeV,15 MeV,6 MV,15 MV）.Methods Based on the Kolmogorov-Smirnov tests and Kruskal-Wallis tests of SPSS,the output of all the energies in the whole year 2009 was tested,and the normality and significant differences of results were obtained.Results Three of the 4 energies（6 MeV,15 MeV,15 MV） were submitted to normal distribution.The 2 electron energies（6 MeV,15 MeV） and the 2 photon energies（6 MV,15 MV） showed no significant difference.Conclusion There are some intrinsic relations between the errors of the electron energies or photon energies.So if physicists or therapists detect intolerant error of one energy,other energies should be seriously observed to assure the patients＇ therapeutic quality.

关 键 词：医用直线加速器 输出剂量 Kolmogorov-Smirnov法 Kruskal-Wallis法 

分 类 号：TH774[机械工程—仪器科学与技术]