Department of Radiological Technology, School of Health Sciences, Faculty of Medicine, Tohoku University, 2-1 Seiryo, Aoba, Sendai 980-8575, Japan.
Health Phys. 2013 Jan;104(1):97-101. doi: 10.1097/HP.0b013e3182659c72.
X-ray equipment should be routinely checked for optimal imaging performance and appropriate radiation dose. Recently, the use of diagnostic x-ray equipment with flat panel detectors (FPDs) has increased instead of image intensifier (II) and/or screen film systems. In addition, it is necessary to maintain the performance of FPD systems. Unfortunately, no simple quality control (QC) phantom is available for easy evaluation of FPD image performance. This manuscript suggests a novel simple and inexpensive QC phantom for radiography and fluoroscopy. The authors made a new QC phantom for FPD systems to evaluate the spatial resolution, low-contrast resolution, and dynamic range on single (one-shot) x-ray exposures. The phantom consists of three copper thicknesses (0.5, 1.5, and 3.0 mm), an aluminum stepwedge (0.1-2.7 mm), and piano wire of various diameters (0.08-0.5 mm). They also performed an initial check of the new phantom using a FPD system (fluoroscopic and radiographic images). The new phantom is simple and inexpensive to make. This simple phantom is very useful for QC of FPD systems because a visual evaluation of image performance in three thicknesses of copper (low, intermediate, and high attenuation) is readily available with a single exposure. This simple method for daily checking of FPD systems (radiography and fluoroscopy) using the phantom constitutes an easy way to routinely check image performance and will be useful for QC.
X 射线设备应定期进行检查，以确保获得最佳的成像性能和适当的辐射剂量。最近，使用带有平板探测器（FPD）的诊断 X 射线设备已经取代了影像增强器（II）和/或屏片系统。此外，还需要维护 FPD 系统的性能。遗憾的是，目前还没有简单的质量控制（QC）体模可用于轻松评估 FPD 图像性能。本文提出了一种用于射线照相和透视的新型简单且经济的 QC 体模。作者制作了一种新的 FPD 系统 QC 体模，用于评估单次 X 射线曝光的空间分辨率、低对比度分辨率和动态范围。该体模由三个铜厚度（0.5、1.5 和 3.0 毫米）、一个铝阶跃（0.1-2.7 毫米）和各种直径的钢琴线（0.08-0.5 毫米）组成。他们还使用 FPD 系统（透视和射线照相图像）对新体模进行了初步检查。新体模制作简单，价格低廉。这种简单的体模对于 FPD 系统的 QC 非常有用，因为通过单次曝光可以轻松地对三种铜厚度（低、中和高衰减）的图像性能进行视觉评估。使用体模对 FPD 系统（射线照相和透视）进行日常 QC 的这种简单方法构成了一种常规检查图像性能的简便方法，将非常有用。
