| 应用MatriXX测量西门子PRIMUS加速器治疗床的金属部件对射野剂量分布的影响 |
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| 引用本文： | 余辉,张书旭,陈静. 应用MatriXX测量西门子PRIMUS加速器治疗床的金属部件对射野剂量分布的影响[J]. 中国医学物理学杂志, 2011, 28(4): 2712-2715,2728. DOI: 10.3969/j.issn.1005-202X.2011.04.002 |
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| 作者姓名： | 余辉 张书旭 陈静 |
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| 作者单位： | 广州医学院附属肿瘤医院放疗中心,广东广州,510095 |
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| 摘 要： | 目的:测量西门子PRIMUS加速器治疗床的金属部件对射野剂量分布的影响。方法:PRIMUS加速器治疗床由可拆卸的床头、网状碳纤维床板和有机玻璃床板三部分组成,3种床板均有金属部件。本文将MatriXX夹在上下各6 cm厚的IBA固体水体模的中间,对齐MatriXX的测量中心轴与治疗床的中心纵轴,SAD为100 cm,首先通过旋转机架分别确定10 cm×10 cm射野能照到3种床板的金属部件的机架角度范围分别是110°~135°(对侧225°~250°)、115°~140°(对侧220°~245°)、155°~180°(对侧180°~205°)。然后采用6 MV X射线,在上述角度区间每间隔5°设一个野,机器跳数为50 MU,分别进行测量。接着在有机玻璃床板上悬空MatriXX,其它条件不变,重复测量不受治疗床影响下的剂量分布。最后对比分析金属部件的衰减影响。结果:3种床板的金属部件对射线的衰减,在等中心处分别为2.1%~22.4%、1.3%~43.8%、0%~46.7%,最大剂量衰减值分别为12.1%~32.2%、12.9%~65.3%、32.8%~58.3%。结论:PRIMUS加速器治疗床的金属部件对射野剂量分布有较大影响,在治疗摆位时须避开。
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| 关 键 词： | 治疗床 MatriXX PRIMUS |
Effect of the Metal Part of Siemens PRIMUS Accelerator Treatment Couch on Radiotherapy Dose by MatriXX |
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| YU Hui,ZHANG Shu-xu,CHEN Jing. Effect of the Metal Part of Siemens PRIMUS Accelerator Treatment Couch on Radiotherapy Dose by MatriXX[J]. Chinese Journal of Medical Physics, 2011, 28(4): 2712-2715,2728. DOI: 10.3969/j.issn.1005-202X.2011.04.002 |
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| Authors: | YU Hui ZHANG Shu-xu CHEN Jing |
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| Affiliation: | YU Hui,ZHANG Shu-xu,CHEN Jing(Department of Radiotherapy Center,the Affiliated Tumour Hospital of Guangzhou Medical College,Guangzhou Guangdong 510095,China) |
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| Abstract: | Objective: To research on the effect of the metal part of Siemens PRIMUS accelerator treatment couch on radiotherapy dose.Methods: There are three parts of PRIMUS accelerator treatment couch.They are couch head,carbon fiber clinoid plate and plexiglass clinoid plate.These three parts all have metal part.In our research,MatriXX was clamped in two IBA phantoms whose thick was 6 cm.The center axis of MatriXX was aligned with the center Y-axis of couch.The distance of source to measure center was 100 cm.Firstly... |
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| Keywords: | MatriXX PRIMUS |
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