| X光透射剂量中模体散射线的物理特性研究 |
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| 引用本文： | 吴爱东,刘磊. X光透射剂量中模体散射线的物理特性研究[J]. 核技术, 2009, 32(7) |
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| 作者姓名： | 吴爱东 刘磊 |
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| 作者单位： | 安徽省立医院放疗科,合肥,230001;安徽省立医院放疗科,合肥,230001 |
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| 基金项目： | 安徽省自然科学基金，国家重点基础研究发展规划(973计划) |
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| 摘 要： | 放射治疗的X光透射剂量中含有不同强度的模体散射线,影响其临床应用.本文基于实验方法在不同条件下测量6 MV X线射野中心轴及离轴位置的透射剂量分布,从中提取原射线剂量,计算得到相应的散射线剂量,分析透射剂量中原射线和模体散射线的大小,研究不同条件下透射剂量中模体散射线分布的物理特性.
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| 关 键 词： | 透射剂量 原射线 模体散射线 剂量验证 |
Physical characteristics of X-rays scattered by phantom in the transmission dose for radiotherapy |
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| WU Aidong,LIU Lei. Physical characteristics of X-rays scattered by phantom in the transmission dose for radiotherapy[J]. Nuclear Techniques, 2009, 32(7) |
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| Authors: | WU Aidong LIU Lei |
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| Affiliation: | Department of Radiation Oncology;Anhui Provincial Hospital;Hefei 230001;China |
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| Abstract: | In radiotherapy, the transmission dose includes the dose contribution by scattered photons from the body volume of a patient exposed to the X-rays, and this affects clinic applications of the transmission dose method of radiotherapy.In this study, distributions of transmission dose under different conditions of 6 MV X-ray irradiation were measured on the central axis and the off-axis positions.The transmission dose composed of the primary dose and the scattered dose was analyzed.The primary dose was extract... |
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| Keywords: | Transmission dose Primary dose Scattered dose Dosimetric verification |
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