| 使用比释动能校准因子测量直线加速器吸收剂量的方法 |
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| 引用本文： | 林清森,陈涛,袁清伟,郝连花,张金岭,赵汝彬. 使用比释动能校准因子测量直线加速器吸收剂量的方法[J]. 医疗装备, 2021, 0(7): 17-18,21 |
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| 作者姓名： | 林清森 陈涛 袁清伟 郝连花 张金岭 赵汝彬 |
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| 作者单位： | 山东省临沂市人民医院放疗技术科 |
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| 摘 要： | 目的 探讨两种使用比释动能校准因子Nk按照TRS 277与TRS 398规范测量吸收剂量方法的差异,旨在为是否可以通过比释动能校准因子Nk按照TRS 398报告测量吸收剂量提供指导.方法 首先从理论上对两种校准方法的校准公式进行推导整理,然后寻找其中的差异,最后对差异进行量化;在此基础上,利用整理后的公式,计算3种常用...
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| 关 键 词： | 吸收剂量 比释动能 TRS 398 TRS 277 剂量校准 |
Methods of Measuring Absorbed Dose for Linear Accelerators by Kerma Correction Factor |
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| Lin Qingsen,Chen Tao,Yuan Qingwei,Hao Lianhua,Zhang Jinling,Zhao Rubin. Methods of Measuring Absorbed Dose for Linear Accelerators by Kerma Correction Factor[J]. Medical Equipment, 2021, 0(7): 17-18,21 |
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| Authors: | Lin Qingsen Chen Tao Yuan Qingwei Hao Lianhua Zhang Jinling Zhao Rubin |
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| Affiliation: | (Department of Radiotherapy Technology,Linyi People's Hospital,Linyi Shandong 276000,China) |
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| Abstract: | Objective The differences of measuring the absorbed dose according to TRS 277 and TRS 398 by kerma correction factor(Nk)were discussed,aiming to provide references for judging whether it is feasible to measure the absorbed dose according to TRS 398 by kerma correction factor(Nk).Methods First,formulas of the two correction methods were derived and collated theoretically.Then,the differences of the formulas were analyzed and quantified.On this basis,correction factors of three common ion chambers were calculated and compared under 6 MV and 10 MV X-rays by the collated formulas.Results The average deviation between the two calibration methods was less than 0.6%.Conclusion It is feasible to measure the absorbed dose for linear accelerators in the light of TRS 398 standard under the circumstance that the kerma correction factor(Nk)is the only factor that is provided. |
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| Keywords: | Absorbed dose Kerma TRS 398 TRS 277 Dose calibration |
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