Cowen A R, Haywood J M, Workman A, Clarke O F
University of Leeds, Department of Medical Physics, General Infirmary.
Br J Radiol. 1987 Oct;60(718):1001-9. doi: 10.1259/0007-1285-60-718-1001.
A set of X-ray test objects has been developed for quality control in digital subtraction fluorography (DSF). Factors which can be assessed include dynamic range, highlight overload and signal-to-noise ratio, low contrast sensitivity, unsharpness, and systematic misregistration. These test objects complement, both in design and calibration, those previously developed to evaluate the imaging performance of television fluoroscopy and small-format fluorography systems. In this article, the first of two, we describe the Leeds DSF test objects, paying particular attention to the reasoning behind their design.
为数字减影荧光造影（DSF）的质量控制开发了一套X射线测试物体。可评估的因素包括动态范围、高光过载和信噪比、低对比度灵敏度、不清晰度以及系统性配准误差。这些测试物体在设计和校准方面对先前开发的用于评估电视荧光透视和小尺寸荧光造影系统成像性能的测试物体起到了补充作用。在这篇分两部分的文章的第一篇中，我们描述了利兹DSF测试物体，特别关注其设计背后的原理。
