Suppr超能文献

用于计算机断层扫描程序中剂量评估的光释光剂量计的特性。

Characterization of OSL dosimeters for use in dose assessment in Computed Tomography procedures.

机构信息

Nuclear Physics Department, Institute of Physics, University of São Paulo, São Paulo, Brazil.

Nuclear Physics Department, Institute of Physics, University of São Paulo, São Paulo, Brazil.

出版信息

Phys Med. 2018 Mar;47:16-22. doi: 10.1016/j.ejmp.2018.02.009. Epub 2018 Feb 19.

Abstract

This study describes the characterization of an AlO:C OSLD (Landauer's Luxel™ tape) for dose evaluation in Computed Tomography. The irradiations were conducted using both a constant potential X-ray equipment and a 64-slice clinical CT scanner, and the readouts were performed using a Risø TL/OSL reader. The following aspects were studied: batch homogeneity, energy response, linearity of dose response, reproducibility, reusability, and effect of uncertainties with the normalization of OSL signals per their response to beta radiation. A group of 330 dosimeters from the 452 irradiated with the same dose presented OSL signals within the interval of 4.7% from the average. The dosimeters presented energy-dependent response in good agreement with results found in the literature. The air kerma response of the OSL signal showed a linear trend for both the constant potential X-ray device and the clinical CT scanner, with differences in their slopes of approximately 10%. Reproducibility, reusability, and effect of beta normalization were analyzed by separating 72 dosimeters in 3 groups. The results obtained in this study together with those of previous works indicate that this type of dosimeter is adequate for dose evaluation in CT clinical applications.

摘要

本研究描述了一种用于 CT 剂量评估的 AlO:C OSLD(Landauer 的 Luxel™ 带)的特性。辐照分别使用恒电位 X 射线设备和 64 层临床 CT 扫描仪进行,读数使用 Risø TL/OSL 阅读器进行。研究了以下方面:批次均匀性、能量响应、剂量响应线性度、重复性、可重复性以及通过对 OSL 信号相对于β辐射的响应进行归一化来消除不确定度的影响。在 452 个用相同剂量辐照的剂量计中,有 330 个剂量计的 OSL 信号在平均值的 4.7%范围内。剂量计的能量响应与文献中的结果非常吻合。OSL 信号的空气比释动能响应对于恒电位 X 射线设备和临床 CT 扫描仪都呈现出线性趋势,斜率差异约为 10%。通过将 72 个剂量计分为 3 组,分析了重复性、可重复性和β归一化的影响。本研究的结果与以前的工作一起表明,这种类型的剂量计适用于 CT 临床应用中的剂量评估。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验