Quantitative Comparisons of Image Quality for Flash X-Ray Detectors

IF 1.9 4区 工程技术 Q3 ENGINEERING, MECHANICAL
F. Wilson, K. Harke, A. J. Hardy, D. J. Kline, K. T. Sullivan, J. Tringe, C. P. Frick, V. Eliasson
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引用次数: 0

Abstract

Due to X-rays’ ability to penetrate materials, flash X-ray radiography can be used for high-speed measurements where direct optical access is not possible. Choice of detector has a pronounced impact on resulting image quality. Four different detector systems were evaluated with a 450kVp flash source to quantitatively compare image quality metrics. The scintillating digital detector had less image noise than the three different storage phosphor computed radiography detectors across all transmission levels, but lacked the spatial resolution of the computed radiography detectors. For the screens tested here, the HPX-DR digital system had the highest signal to noise ratio of 68.24 and contrast to noise ratio of 35.53, but had a the lowest spatial resolution, resolving 2.5 line pairs per millimeter at 1.78\(\%\) contrast. At a value of 37.59, the Flex GP imaging plate had a signal to noise value above its storage phosphor counterparts under a 450kVp flash source. For radiographic setups typically used for dynamic experiments, the Flex XL Blue and Flex HR detectors had signal to noise ratios of 18.44 and 26.56 respectively. The highest resolved spatial frequencies of the Flex GP, Flex XL Blue, and Flex HR with the flash source are 3.85, 5.00, and 3.85 line pairs per millimeter, respectively. The Flex GP detector had the best combination of signal to noise ratio, contrast to noise ratio, and spatial resolution under a flash source.

闪光x射线探测器图像质量的定量比较
由于x射线穿透材料的能力,闪光x射线摄影可以用于高速测量,而直接光学访问是不可能的。检测器的选择对产生的图像质量有明显的影响。使用450kVp闪光灯源对四种不同的检测器系统进行评估,定量比较图像质量指标。在所有传输水平上,闪烁数字探测器比三种不同的存储荧光粉计算机x线摄影探测器具有更低的图像噪声,但缺乏计算机x线摄影探测器的空间分辨率。对于这里测试的屏幕,HPX-DR数字系统具有最高的信噪比为68.24,对比度为35.53,但具有最低的空间分辨率,分辨率为每毫米2.5线对,对比度为1.78 \(\%\)。当值为37.59时,Flex GP成像板在450kVp闪光灯下的信噪比高于对应的存储荧光粉。对于通常用于动态实验的射线照相装置,Flex XL Blue和Flex HR探测器的信噪比分别为18.44和26.56。Flex GP、Flex XL Blue和Flex HR的最高分辨空间频率分别为3.85、5.00和3.85线对/毫米。Flex GP探测器在闪光灯下具有最佳的信噪比、比噪比和空间分辨率组合。
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来源期刊
Experimental Techniques
Experimental Techniques 工程技术-材料科学:表征与测试
CiteScore
3.50
自引率
6.20%
发文量
88
审稿时长
5.2 months
期刊介绍: Experimental Techniques is a bimonthly interdisciplinary publication of the Society for Experimental Mechanics focusing on the development, application and tutorial of experimental mechanics techniques. The purpose for Experimental Techniques is to promote pedagogical, technical and practical advancements in experimental mechanics while supporting the Society''s mission and commitment to interdisciplinary application, research and development, education, and active promotion of experimental methods to: - Increase the knowledge of physical phenomena - Further the understanding of the behavior of materials, structures, and systems - Provide the necessary physical observations necessary to improve and assess new analytical and computational approaches.
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