Feasibility study of glass dosimeter postal dosimetry audit of high-energy radiotherapy photon beams
Feasibility study of glass dosimeter postal dosimetry audit of high-energy radiotherapy photon beams
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DOI：
10.1016/j.radonc.2007.10.024
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发表时间：
2008-02-01
影响因子：
5.7
通讯作者：
Ikeda, Hiroshi
中科院分区：
文献类型：
--
作者：
Mizuno, Hideyuki;Kanai, Tatsuaki;Ikeda, Hiroshi
介绍：研究了玻璃剂量计作为邮寄剂量审计工具的潜在用途。与热释光剂量计（TLD）的再现性、能量依赖性、场大小和深度依赖性进行了比较，热释光剂量计（TLD）已成为全球邮政剂量审计的主要工具。材料和方法：用Co-60单元的伽马射线和医用直线加速器的x射线（4、6、10和20 MV）照射玻璃剂量计GD-302M（旭硝子玻璃公司）和TLD TLD-100芯片（Harshaw公司）。结果：在10 × 10 cm(2)视场、10 cm深度的参比条件下，玻璃剂量计的剂量学特性与TLD的剂量学特性基本相当。由于与TLD相比，玻璃剂量计减少了褪色，并且易于使用ID号进行质量控制，因此证明玻璃剂量计是邮政剂量审计的合适工具。然后，我们对100多个设施进行了邮政剂量调查，得到了很好的一致性，标准差约为1.3%。结论：基于这项研究，整个日本的邮政剂量审计将使用玻璃剂量计进行。2007爱思唯尔爱尔兰有限公司版权所有。
Introduction: The characteristics of a glass dosimeter were investigated for its potential use as a tool for postal dose audits. Reproducibility, energy dependence, field size and depth dependence were compared to those of a thermoluminescence dosimeter (TLD), which has been the major tool for postal dose audits worldwide.Materials and methods: A glass dosimeter, GD-302M (Asahi Techno Glass Co.) and a TLD, TLD-100 chip (Harshaw Co.) were irradiated with gamma-rays from a Co-60 unit and X-rays from a medical linear accelerator (4, 6, 10 and 20 MV).Results: The dosimetric characteristics of the glass dosimeter were almost equivalent to those of the TLD, in terms of utility for dosimetry under the reference condition, which is a 10 X 10 cm(2) field and 10 cm depth. Because of its reduced fading, compared to the TLD, and easy quality control with the ID number, the glass dosimeter proved to be a suitable tool for postal dose audits. Then, we conducted postal dose surveys of over 100 facilities and got good agreement, with a standard deviation of about 1.3%.Conclusions: Based on this study, postal dose audits throughout Japan will be carried out using a glass dosimeter. (c) 2007 Elsevier Ireland Ltd. All rights reserved.