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Assessments of the characteristics of an extrapolation chamber for 60 to 200 kVp X-rays: Experiment and Monte Carlo simulation
Radiation Physics and Chemistry ( IF 2.9 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.radphyschem.2020.108682
Seyed Milad Vahabi , Mojtaba Shamsaei Zafarghandi

Abstract According to the principles of radiation protection, the patient and personnel dose should be decreased to a reasonably achievable level. Therefore, it is essential to use reliable dosimeters in the radiation dosimetry course. One of these dosimeters is an extrapolation chamber. It is a plane-parallel ion chamber (PPIC), which its sensitive volume can be varied. In this paper, the performance of an extrapolation chamber has been evaluated in 60–200 kVp X-rays. It was submitted to several necessary tests, and also simulated with MCNP code. All of the results were within the recommendations of the International Electrotechnical Commission (IEC). The chamber responses were linear with electrode separation. The comparison between experiment and simulation agrees in an overall sense within 5.4% in the worst case. The results indicated the usefulness of the chamber in this energy range. They show that the extrapolation chamber can be also used for computed tomography (CT) beams, considering that a primary standard system doesn't exist for these beams yet.

中文翻译:

对 60 至 200 kVp X 射线外推室特性的评估:实验和蒙特卡罗模拟

摘要 根据辐射防护的原则,应将患者和人员的剂量降低到合理可达到的水平。因此,在辐射剂量学课程中使用可靠的剂量计是必不可少的。这些剂量计之一是外推室。它是一个平面平行离子室 (PPIC),其敏感体积可以变化。在本文中,外推室的性能在 60-200 kVp X 射线下进行了评估。它提交了几个必要的测试,并用 MCNP 代码进行了模拟。所有结果均在国际电工委员会 (IEC) 的建议范围内。腔室响应与电极间隔呈线性关系。在最坏的情况下,实验和模拟之间的比较总体上一致在 5.4% 以内。结果表明该腔室在该能量范围内是有用的。他们表明外推室也可用于计算机断层扫描 (CT) 光束,考虑到这些光束尚不存在主要标准系统。
更新日期:2020-05-01
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