Stability of PRESAGE® dosimeter for end-to-end radiotherapy dosimetry audit and dose delivery

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

Radiation Measurements Pub Date : 2025-04-11 DOI:10.1016/j.radmeas.2025.107434

Muhammad Zamir Mohyedin , Hafiz Mohd Zin , Ngie Min Ung , David A. Bradley , Ahmad Taufek Abdul Rahman

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Abstract

The stability of commercially available PRESAGE® was evaluated for use in complex radiotherapy dose delivery and audit. The dose-response of PRESAGE® under room temperature, low temperature and exposure to visible light was investigated. The photon energy and dose rate dependence of the PRESAGE® were also investigated. It shows a different response under different temperatures. It was demonstrated that this batch of PRESAGE® shows decreased optical density (OD) over time instead of increased OD like a common PRESAGE®. Additionally, the OD of PRESAGE® decreases more slowly which is 0.1 % each hour under low temperature. PRESAGE® also quickly returned to its original state within 48 h post-irradiation under room temperature which the OD decreased by 2.06 % each hour. Upon its return to its original state, the PRESAGE® was able to be reused again with the dose-response reproducibility of more than 99 %. This study also shows that the PRESAGE® is highly sensitive to the visible light radiated by the common fluorescent lamp. The longer the exposure, the higher the optical density within the PRESAGE® which on average, the OD increased by 21.13 % each hour of exposure. The PRESAGE® shows a small dependence of energy with the linearity difference of 5.22 % and shows the independence of dose rate with a variation of less than 5 %.

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用于端到端放射剂量学审核和剂量传递的preage剂量计的稳定性

对市售PRESAGE®的稳定性进行了评估，以用于复杂放疗剂量传递和审核。研究了PRESAGE®在室温、低温和可见光下的剂量效应。还研究了PRESAGE®的光子能量和剂量率依赖性。它在不同的温度下表现出不同的响应。结果表明，这批PRESAGE®的光密度（OD）随着时间的推移而降低，而不是像普通PRESAGE®那样增加OD。此外，在低温下，preage®的OD降低速度较慢，每小时降低0.1%。PRESAGE®在室温照射后48小时内也能迅速恢复到原始状态，OD每小时下降2.06%。在恢复到原始状态后，PRESAGE®能够再次重复使用，剂量-反应重现性超过99%。该研究还表明，PRESAGE®对普通荧光灯辐射的可见光高度敏感。曝光时间越长，PRESAGE®内的光密度越高，平均每曝光一小时，OD增加21.13%。PRESAGE®对能量的依赖性很小，线性差为5.22%，对剂量率的依赖性小于5%。

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.