Dose calculation for photon-emitting brachytherapy sources with average energy higher than 50 keV: Report of the AAPM and ESTRO
Dose calculation for photon-emitting brachytherapy sources with average energy higher than 50 keV: Report of the AAPM and ESTRO
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DOI：
10.1118/1.3703892
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发表时间：
2012-05-01
期刊：
影响因子：
3.8
通讯作者：
Williamson, Jeffrey F.
中科院分区：
文献类型：
--
作者：
Perez-Calatayud, Jose;Ballester, Facundo;Williamson, Jeffrey F.
目的：美国医学物理学家协会（AAPM）和欧洲放射治疗和肿瘤学会（ESTRO）关于高能辐射剂量计算的建议（平均能量高于50 keV）光子发射近距离治疗源，包括特定的Ir-192，Cs-137和Co-60源模型的物理特性。本报告由高能近距离放射治疗源剂量测定（HEBD）工作组编写。本报告包括在TG-43 U1形式主义的应用中的考虑，以高能量的光子发射源，特别注意幻影尺寸的影响，插值精度依赖于剂量计算网格大小，和剂量测定参数依赖于源active length.Results：共识数据集的商业可用的高能量光子源，沿着与推荐的方法来评估这些数据集。建议剂量表征方法，主要是使用实验程序和蒙特卡罗，建立和讨论。还包括对探测器选择，探测器能量响应特性和体模材料，和测量规范方法的方法学建议。不确定性分析进行了讨论，并建议高能量源没有共识datasets given.Conclusions：建议的共识datasets为高能量源已被商业化的来源，截至2010年1月。根据AAPM TG-43 U1的形式主义，与修改的插值和外推技术的AAPM TG-43 U1 S1报告的二维各向异性函数和径向剂量函数的数据。(C)2012年美国医学物理学家协会。[http：//dx.doi.org/10.1118/1.3703892]
Purpose: Recommendations of the American Association of Physicists in Medicine (AAPM) and the European Society for Radiotherapy and Oncology (ESTRO) on dose calculations for high-energy ( average energy higher than 50 keV) photon-emitting brachytherapy sources are presented, including the physical characteristics of specific Ir-192, Cs-137, and Co-60 source models.Methods: This report has been prepared by the High Energy Brachytherapy Source Dosimetry (HEBD) Working Group. This report includes considerations in the application of the TG-43U1 formalism to high-energy photon-emitting sources with particular attention to phantom size effects, interpolation accuracy dependence on dose calculation grid size, and dosimetry parameter dependence on source active length.Results: Consensus datasets for commercially available high-energy photon sources are provided, along with recommended methods for evaluating these datasets. Recommendations on dosimetry characterization methods, mainly using experimental procedures and Monte Carlo, are established and discussed. Also included are methodological recommendations on detector choice, detector energy response characterization and phantom materials, and measurement specification methodology. Uncertainty analyses are discussed and recommendations for high-energy sources without consensus datasets are given.Conclusions: Recommended consensus datasets for high-energy sources have been derived for sources that were commercially available as of January 2010. Data are presented according to the AAPM TG-43U1 formalism, with modified interpolation and extrapolation techniques of the AAPM TG-43U1S1 report for the 2D anisotropy function and radial dose function. (C) 2012 American Association of Physicists in Medicine. [http://dx.doi.org/10.1118/1.3703892]