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首页> 外文期刊>Journal of Nuclear Physics, Material Sciences, Radiation and Applications >Development and Validation of an X-ray Imaging Detector for Digital Radiography at Low Resolution
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Development and Validation of an X-ray Imaging Detector for Digital Radiography at Low Resolution

机译：低分辨率数字射线照相X射线成像探测器的开发和验证

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Digital X-ray detectors are required in different sciences and applications, however many high quality devices are expensive although high-resolution images are not always required. We present an easy way to build a detector capable of forming X-ray digital images and video with a very large area (18×18 cm~(2)). The detector is formed by three main components: scintillator, optics lenses and CCD sensor. Basically, the device converts the X-rays into visible light which is then collected by the CCD sensor. The scintillator is Gadox type, from Carestream?, 18×18 cm~(2), regular type, lambda 547 nm. The optics lenses are generic, with manual focus and widely visual field. The CCD sensor has a size of 1/3″, 752 × 582 pixels, monochrome, 20 FPS, 12 bits ADC and pixel size of 3.8 μm. With the built detector and an X-ray source, we formed an X-ray imaging detection system to generate digital radiographs of biological or inert objects-examples are given-, as well as real-time X-ray video. Additionally, the spatial resolution limit was measured in terms of Modulation Transfer Function by the method of opaque edge from a lead sheet with a result of 1.1 Lp/mm. Finally using a filter, the focal spot of the X-ray source is measured, resulting in a diameter of 0.9 mm (FWHM).
机译：在不同的科学和应用中都需要数字X射线探测器，但是尽管并非总是需要高分辨率的图像，但许多高质量的设备价格昂贵。我们提出一种简单的方法来构建能够形成很大面积（18×18 cm〜（2））的X射线数字图像和视频的检测器。该探测器由三个主要部分组成：闪烁体，光学透镜和CCD传感器。基本上，该设备将X射线转换为可见光，然后由CCD传感器收集。闪烁体是Gadox型，购自Carestream ?， 18×18 cm〜（2），常规型，λ547 nm。光学镜片是通用的，具有手动对焦和广阔的视野。 CCD传感器的尺寸为1/3英寸，752×582像素，单色，20 FPS，12位ADC，像素尺寸为3.8μm。借助内置的探测器和X射线源，我们形成了一个X射线成像检测系统，可以生成生物或惰性物体的数字射线照相（给出示例）以及实时X射线视频。此外，空间分辨率极限是通过调制传递函数，通过不透明边缘的方法测量的，该方法来自引线片，结果为1.1 Lp / mm。最后，使用滤光片，测量X射线源的焦点，得出直径为0.9毫米（FWHM）。

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