Evaluation of the performance of digital x-ray systems in pelvis radiography.

IF 1.4 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
Antonio Jreije, Leonid Krynke, Birutė Gricienė, Bernardas Rimkus, Jūratė Dementavičienė, Kirill Skovorodko
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Abstract

The aim of this study was to investigate the performance of eight digital radiography systems and to optimise the dose-image quality relationship for digital pelvis radiography. The study involved eight digital radiography systems used for general examinations at Vilnius University Hospital Santaros Klinikos. An anthropomorphic pelvic phantom (CIRS, US) was used to simulate a patient undergoing clinical pelvis radiography. Dose quantities entrance surface dose, dose area product (DAP) and exposure parameters (kVp, mA, mAs) were measured and the effects on the images were evaluated, considering physical contrast to noise ratio (CNR) and observer-based evaluations as image quality metrics. Increasing the tube voltage by 5 kVp from standard protocol led to a reduction in radiation dose (DAP) by 12%-20% with a slight impact on image quality (CNR decreases by 2%-10%). There was an inter-observer variability in image rating across different equipment (kappa value between 0 and 0.3); however, both observers agreed that increasing kVp up to 85-90 kV had no effect on perceived image quality. The results indicate that optimisation strategies should be tailored specifically for each x-ray system since significant performance differences and wide variations in radiation dose exist across various digital radiography systems used in clinical settings. The use of high kVp can be used for dose optimisation in digital pelvis radiography without compromising image diagnostic accuracy.

评估数字 X 射线系统在骨盆放射摄影中的性能。
这项研究的目的是调查八种数字放射摄影系统的性能,并优化数字骨盆放射摄影的剂量-图像质量关系。研究涉及维尔纽斯大学 Santaros Klinikos 医院用于普通检查的八套数字射线摄影系统。使用一个拟人骨盆模型(CIRS,美国)来模拟接受临床骨盆射线照相术的病人。测量了剂量量 ESD(入口表面剂量)、DAP(剂量面积乘积)和曝光参数(kVp、mA、mAs),并评估了对图像的影响,将物理 CNR(对比度与噪声比)和基于观察者的评价作为图像质量指标。在标准方案的基础上将电子管电压提高 5 kVp,可使辐射剂量(DAP)降低 12-20%,但对图像质量略有影响(CNR 降低 2-10%)。不同设备的图像评分在观察者之间存在差异(kappa 值在 0 到 0.3 之间);不过,两位观察者都认为,将 kVp 提高到 85-90 kV 对感知图像质量没有影响。研究结果表明,由于临床使用的各种数字射线摄影系统在性能上存在显著差异,辐射剂量也有很大不同,因此应针对每种 X 射线系统专门制定优化策略。在数字骨盆放射摄影中使用高 kVp 可以优化剂量,而不会影响图像诊断的准确性。
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
Journal of Radiological Protection
Journal of Radiological Protection 环境科学-公共卫生、环境卫生与职业卫生
CiteScore
2.60
自引率
26.70%
发文量
137
审稿时长
18-36 weeks
期刊介绍: Journal of Radiological Protection publishes articles on all aspects of radiological protection, including non-ionising as well as ionising radiations. Fields of interest range from research, development and theory to operational matters, education and training. The very wide spectrum of its topics includes: dosimetry, instrument development, specialized measuring techniques, epidemiology, biological effects (in vivo and in vitro) and risk and environmental impact assessments. The journal encourages publication of data and code as well as results.
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