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目的 总结分析200例SBRT放疗计划验证结果,分析SBRT计划验证的γ通过率及其影响因素.方法 采用二维和三维探测器矩阵(Mapcheck、瑞典Delta4)对SBRT放疗计划进行治疗前的计划验证.分析不同治疗技术IMRT和VMAT对计划验证通过率的影响.研究不同验证标准(2％/2 mm、3％/3 mm、5％/3 mm标准,阈值10％)并比较验证计划与治疗计划验证结果之间的差异,并行独立样本t检验.研究并分析不同肿瘤类型对计划通过率的影响.结果 200例SBRT计划γ通过率均能满足临床治疗的要求:IMRT计划的γ通过率在2％/2 mm、3％/3 mm标准下依次为(95.95±7.39)％、(99.76±1.94)％;VMAT计划使用Delta4验证结果显示:γ通过率在2％/2 mm、3％/3 mm标准下依次为(97.02±3.86)％、(99.51±1.41)％;不同肿瘤类型计划验证的γ通过率不同,IMRT和VMAT计划验证γ通过率差异无统计学意义.结论 200例SBRT计划的验证结果均能达到临床治疗的要求,IMRT和VMAT计划验证通过率不同,无统计学意义;不同肿瘤和治疗技术(IMRT和VMAT)的SBRT计划验证通过率不同,统计学分析显示无意义.“,”Objective To investigate the γ pass rate and affecting factors by summarizing and analyzing the radiotherapy plan validation results of 200 SBRT plans.Methods Two-dimensional and three-dimensional detector matrix (Mapcheck, Sweden Delta4) was used to verify the plan for SBRT radiotherapy before treatment.Analyze the impact of different treatment technologies (such as IMRT and VMAT) on the pass rate plan verification. To study the difference between different validation criteria (2/2 mm/3 mm/5/3 mm, threshold 10％) and compare the differences of results between the verification plan and the treatment plan, and carry out independent sample t-test. To study and analyze the impact of different tumor types on planned pass rates.Results he γ pass rate of 200 SBRT plans can meet the requirements of clinical treatment; the γ pass rate of IMRT plan is (95.95±7.39) ％ and (99.76±1.94) ％, successively, under the standard of 2％/2 mm and 3％/3 mm. The results show that theγpass rate of VMAT plan using Delta4 validation is (95.95±7.39) ％ and (99.76±1.94) ％, successively, under the standard of 2％/2 mm and 3％/3 mm. The γ pass rate of different tumor type plan verification is different, but there is no significant difference to verify the γ pass rate between IMRT and VMAT plan.Conclusion The verification results of 200 SBRT plans can meet the requirements of clinical treatment. The IMRT and VMAT plans have different pass rates, but they have no statistical significance. The SBRT plans validations for different tumors and treatment technologies (IMRT and VMAT) have different verification pass rates. They statistical significance.