Evaluation of a novel physically cross-linked fricke-xylenol orange-polyvinyl alcohol radio-chromic gel dosimeter for radiotherapy

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY Radiation Measurements Pub Date : 2024-08-03 DOI:10.1016/j.radmeas.2024.107263

Molham M. Eyadeh , Khalid A. Rabaeh , Laith S. Alshomali , Kevin R. Diamond , Ammar A. Oglat

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Abstract

In this work, a novel sensitive composition of Fricke radio-chromic gel dosimeter based on polyvinyl alcohol (PVA), xylenol orange (XO), and physical cross-linking agent gellan gum (GG) is presented and evaluated with two optically detection methods. The Fricke dosimeter was irradiated up to 30Gy using medical linear accelerator and analyzed optically using ultraviolet visible (UV–Vis) spectrophotometry technique at wavelengths of 585 nm (i.e., within the visible range) and two-dimensional optical imaging system of charge-coupled-device (CCD) camera with a uniform red light-emitting-diode (LED) array source. The Fricke dosimeter demonstrated important properties including independence of beam energy and dose rate over the range studied. In addition, these dosimeters have high sensitivity in the range of 0–10Gy, and significant low diffusion coefficient of 0.070 mm² h⁻¹. In addition, the composition shows a lower diffusion coefficient with respect to those reported so far for a Fricke dosimeter. The total uncertainty of the estimated doses for the Fricke dosimeter was 3.96% at 95% confidence level.

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评估用于放射治疗的新型物理交联弗里克-二甲酚橙-聚乙烯醇放射变色凝胶剂量计

在这项工作中，介绍了一种基于聚乙烯醇 (PVA)、二甲酚橙 (XO) 和物理交联剂结冷胶 (GG) 的新型 Fricke 射线变色凝胶剂量计灵敏成分，并用两种光学检测方法对其进行了评估。使用医用直线加速器对 Fricke 剂量计进行了 30Gy 的辐照，并使用波长为 585 nm（可见光范围内）的紫外可见（UV-Vis）分光光度法和带有均匀红色发光二极管（LED）阵列光源的电荷耦合器件（CCD）相机二维光学成像系统进行了光学分析。弗里克剂量计显示出重要的特性，包括在研究范围内光束能量和剂量率的独立性。此外，这些剂量计在 0-10Gy 范围内具有高灵敏度，扩散系数低至 0.070 mm h。在 95% 的置信水平下，弗里克剂量计估计剂量的总不确定性为 3.96%。

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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.