摘要
目的:校准二维半导体剂量矩阵(SRS MapCHECK)探测器,并初步评估其用于治疗计划质量保证(QA)工作。方法:StereoPHAN模体和SNCPatient软件配合SRS Mapcheck探测器进行QA测量,使用Trilogy型医用直线加速器的6 MV光子束对矩阵作阵列和绝对剂量校准,测试多叶准直器(MLC)单野、调强放射治疗(IMRT)及容积弧形调强放射治疗(VMAT)临QA计划在3 mm/3%、2 mm/2%及1 mm/1%标准下的二维γ通过率。结果:在绝对剂量分析模式3 mm/3%、2 mm/2%及1 mm/1%标准下,MLC单野QA计划平均γ通过率分别为100.0%、99.7%和89.1%;IMRT和VMAT临床病历QA计划3 mm/3%、2 mm/2%及1 mm/1%的γ通过率分别为100%,99.6%和85.5%、以及99.4%、97.5%和81.4%。在相对剂量分析模式下,MLC单野QA计划3 mm/3%、2 mm/2%及1 mm/1%的平均γ通过率分别为100.0%、99.5%和86.2%;IMRT和VMAT临床病历QA计划3 mm/3%、2 mm/2%及1 mm/1%的γ通过率分别为100%、100%和90.2%,以及98.9%、91.2%和75.3%。结论:SRS MapCHECK半导体矩阵探测器适用于6 MV光子束IMRT及VMAT临床计划的QA工作。
Objective:To calibrate SRS MapCHECK diode matrix detector and preliminarily assess the quality assurance(QA)of corresponding treatment plan.Methods:StereoPHAN and SNC Patient software cooperated with SRS MapCHECK detector to carry out QA measurements.And then,the two-dimensionγpass rates under 3 mm/3%,2 mm/2%and 1 mm/1%criteria of clinical QA of multi-leaf collimator(MLC)fields,intensity-modulated radiation therapy(IMRT)and volumetric-modulated arc therapy(VMAT)were measured.Results:Under the criteria of 3 mm/3%,2 mm/2%and 1 mm/1%of absolute dose analysis mode,the averageγpass rates of MLC field QA plans were 100.0%,99.7%and 89.1%.And theγpass rates of 3 mm/3%,2 mm/2%and 1 mm/1%of clinically medical history QA plans of IMRT and VMAT were(100%,99.6%and 85.5%)and(99.4%,97.5%and 81.4%)respectively.Under analysis mode of relative dose,the averageγpass rates of 3 mm/3%,2 mm/2%and 1 mm/1%of MLC field QA plans were 100.0%,99.5%and 86.2%,respectively.And theγpass rates of 3 mm/3%,2 mm/2%and 1 mm/1%of clinically medical history of QA plans of IMRT and VMAT were(100.0%,100.0%and 90.2%)and(98.9%,91.2%and 75.3%)respectively.Conclusion:The SRS MapCHECK diode matrix detector is suitable for the QA work of clinical plans of IMRT and VMAT of 6 MV photon beam.
作者
杨晶
梁志文
刘洪源
聂鑫
杨志勇
程军平
黎国全
韩军
张盛
伍钢
YANG Jing;LIANG Zhi-wen;LIU Hong-yuan(Cancer Center,Union Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430022,China)
出处
《中国医学装备》
2020年第6期29-33,共5页
China Medical Equipment
基金
国家重点研发计划数字化诊疗装备研发专项(2016YFC0106700)“立体定向放射治疗设备评价体系的构建和应用研究”
华中科技大学同济医学院附属协和医院院内科学研究(02.03.2018-131)“机器人放射外科系统中治疗计划和质量保证的关键技术研究”。
