商用光激发发光和锡过滤辐射光致发光玻璃剂量计的剂量学特性，用于一般放射照相中精确的辐射剂量测量

IF 2.7 3区医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Physica Medica-European Journal of Medical Physics Pub Date : 2025-06-24 DOI:10.1016/j.ejmp.2025.105030

Sumalee Yabsantia , Kosuke Matsubara , Chirasak Khamfongkhruea , Sawanee Suntiwong , Nuntawat Udee , Titipong Kaewlek , Darrin Madtohed , Nobpamadsiri Boonkrachang , Pratchayakan Hompeng , Thunyarat Chusin

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引用次数: 0

摘要

背景准确的辐射剂量测量依赖于特性良好的剂量计特性。本文研究了光激发发光剂量计（OSLD）和锡滤光辐射光致发光玻璃剂量计（RPLGD）测量普通x射线成像过程中入射空气克马（Ki）、入口表面空气克马（Ke）和吸收剂量(D)的特点。方法对OSLD和RPLGD的辐射敏感性和信号稳定性进行评价。在Ki， Ke和D测量条件下，使用电离室表征了它们在0.5-7.0 mGy剂量范围内的线性响应，在60和120 kVp之间的能量依赖性以及累积剂量测量的变异性。结果OSLD和RPLGD的敏感性校正因子分别为0.96 ~ 1.04 （CoV: 1.99%）和0.90 ~ 1.06 （CoV: 3.75%）。OSLD的每次读数信号损耗为- 0.40±0.11%，RPLGD为- 0.03±0.04%。60天内，OSLD的信号衰减为- 6.83±0.40%，RPLGD的信号衰减为- 2.70±0.20%。两种剂量计均表现出良好的剂量-响应线性关系(R2 >；OSLD和RPLGD的校正因子分别为0.98 ~ 1.01 （CoV: 1.20%）和1.01 ~ 1.05 （CoV: 1.95%）。相对于Ki条件下80kvp校准，OSLD的光束质量校正系数为0.93 ~ 1.14 (CoV: 5.76%)， RPLGD的光束质量校正系数为0.87 ~ 1.07 （CoV: 5.36%）。OSLD和RPLGD的累积剂量读数的重复性分别为2.32%和7.96%。结论在Ki、Ke和D的累积测量中，sosld具有更好的均匀性和重复性，而RPLGD具有更好的信号稳定性。这两种剂量计显示出不同的特性，强调了应用校正因子进行精确辐射剂量测量的重要性。

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Dosimetric characterisation of commercial optically stimulated luminescence and tin-filtered radiophotoluminescence glass dosimeters for accurate radiation dose measurement in general radiography

Background

Accurate radiation dose measurements rely on well-characterised dosimeter properties. This study investigated the characteristics of optically stimulated luminescence dosimeters (OSLD) and tin-filtered radiophotoluminescence glass dosimeters (RPLGD) in measuring incident air kerma (K_i), entrance surface air kerma (K_e), and absorbed dose (D) during general X-ray imaging.

Methods

We evaluated the radiation sensitivity and signal stability of OSLD and RPLGD. Their linear responses across doses from 0.5–7.0 mGy, energy dependence between 60 and 120 kVp, and variability in accumulated dose measurements were characterised using an ionisation chamber under K_i, K_e, and D measurement conditions.

Results

The sensitivity correction factors for OSLD and RPLGD ranged from 0.96 to 1.04 (CoV: 1.99 %) and 0.90–1.06 (CoV: 3.75 %), respectively. Signal depletion per reading was −0.40 ± 0.11 % for OSLD and −0.03 ± 0.04 % for RPLGD. Over 60 days, signal fading was −6.83 ± 0.40 % for OSLD and −2.70 ± 0.20 % for RPLGD. Both dosimeters showed excellent dose–response linearity (R² > 0.995), with correction factors of 0.98–1.01 (CoV: 1.20 %) for OSLD and 1.01–1.05 (CoV: 1.95 %) for RPLGD. Beam quality correction factors ranged from 0.93 to 1.14 (CoV: 5.76 %) for OSLD and 0.87–1.07 (CoV: 5.36 %) for RPLGD, relative to 80 kVp calibration in K_i condition. Reproducibility of accumulated dose readings across nine fractions was within 2.32 % and 7.96 % for OSLD and RPLGD.

Conclusions

OSLD demonstrated superior uniformity and greater reproducibility in accumulated measurements of K_i, K_e, and D, whereas RPLGD exhibited enhanced signal stability. Both dosimeters displayed distinct characteristics, underscoring the importance of applying correction factors for accurate radiation dose measurement.

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来源期刊

Physica Medica-European Journal of Medical Physics 生物-生物物理

CiteScore

6.80

自引率

14.70%

发文量

493

审稿时长

78 days

期刊介绍： Physica Medica, European Journal of Medical Physics, publishing with Elsevier from 2007, provides an international forum for research and reviews on the following main topics: Medical Imaging Radiation Therapy Radiation Protection Measuring Systems and Signal Processing Education and training in Medical Physics Professional issues in Medical Physics.