Performance of a BeO-based dosimetry system for proton and electron beam dose measurements

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements Pub Date : 2024-10-16 DOI:10.1016/j.radmeas.2024.107310

Lily Bossin , Riccardo Dal Bello , Jeppe Brage Christensen , Stefan Schischke , Silvia Motta , Michele Togno , Eduardo Gardenali Yukihara

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引用次数: 0

Abstract

This study aims to evaluate the performance of the BeO-based myOSLchip system (RadPro International GmbH, Remscheid, Germany) for dosimetry of proton and electron radiotherapy beams. Although beryllium oxide (BeO) has been recognised as a promising material for luminescence dosimetry in radiotherapy, this research extends beyond material properties and examines the entire BeO-based dosimetry system, including the detector, holder, and readout components.

Packages of myOSLchip dosimeters were irradiated either in a (

70 - 230

) MeV proton beam or in a 16 MeV electron beam. The readouts were carried out using the portable myOSLchip reader. In the electron beam, tests on the precision, dose response up to 100 Gy and dose-rate effects of the system were carried out. In the proton beam, the system was tested for its dose response (up to 10 Gy), fading, and linear energy transfer (LET) response.

For proton irradiations, the myOSLchip BeO OSLDs exhibited stability within 2% over 135 days, as well as a linear dose response in the tested range, (

0.1 - 10

) Gy. The efficiency showed a reduction for proton beams with LET values (for water) above 0.6 keV/

μ

m, with up to 40% loss in efficiency at 4 keV/

μ

m. For the electron irradiations, they showed a linear dose–response up to 20 Gy and dose-rate independence, with a constant response at least up to 2.99 × 10⁵ Gy s⁻¹. Using individual dosimeter sensitivity correction, the precision for a single dosimeter was around 3.5% (standard deviation of the data of all dosimeters) and for a package comprising four dosimeters was 1.7% (standard deviation of the mean of the four dosimeters).

These findings suggest the myOSLchip system’s potential as a reliable alternative to existing dosimetry systems in clinical applications.

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基于氧化铍的剂量测定系统在质子和电子束剂量测量中的性能

本研究旨在评估基于氧化铍的 myOSLchip 系统（RadPro International GmbH，德国雷姆沙伊德）在质子和电子放射治疗束剂量测定方面的性能。虽然氧化铍（BeO）已被认为是放射治疗中一种很有前途的发光剂量测定材料，但本研究并不局限于材料特性，而是对整个基于氧化铍的剂量测定系统进行了研究，包括探测器、支架和读出组件。使用便携式 myOSLchip 读取器进行读取。在电子束中，对系统的精确度、100 Gy 以下的剂量响应和剂量率效应进行了测试。对于质子辐照，myOSLchip BeO OSLD 在 135 天内表现出 2% 的稳定性，并在测试范围（0.1-10）Gy 内表现出线性剂量响应。对于 LET 值（对水而言）高于 0.6 keV/μm 的质子束，效率有所下降，在 4 keV/μm 时效率下降达 40%。对于电子辐照，它们显示出高达 20 Gy 的线性剂量反应和剂量率独立性，至少在 2.99 × 105 Gy s-1 时反应恒定。使用单个剂量计灵敏度校正，单个剂量计的精确度约为3.5%（所有剂量计数据的标准偏差），而由四个剂量计组成的套件的精确度为1.7%（四个剂量计平均值的标准偏差）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiation Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.