Krug B, Steinbrich W, Lorenz R, Glathe S, Dietlein M, Schirrmeister J
Radiologisches Institut, Universität Köln.
Rofo. 1990 Feb;152(2):131-6. doi: 10.1055/s-2008-1046838.
120 double-contrast barium enemas were obtained by both digital luminescent radiography (DLR) and conventional screen-film systems, the digital exposure dose being 50% of the conventional one. In DLR two differently post processed images were obtained from one x-ray exposure: a display with low spatial frequency enhancement was processed to look like a conventional radiograph and was complemented by a display with high spatial frequency enhancement. Analysing the results statistically DLR proved to be diagnostically equivalent to conventional radiography despite the reduction in exposure dose and a slightly diminished image quality. High spatial frequency enhancement did not provide further diagnostic information and is therefore superfluous in barium enemas.
通过数字荧光X线摄影（DLR）和传统屏-片系统获得了120例双重对比钡剂灌肠检查图像，数字曝光剂量为传统剂量的50%。在DLR中，一次X线曝光可获得两幅经过不同后处理的图像：一幅经过低空间频率增强处理，使其看起来像传统X线片，另一幅则经过高空间频率增强处理。通过统计学分析结果表明，尽管曝光剂量降低且图像质量略有下降，但DLR在诊断上与传统X线摄影相当。高空间频率增强并未提供更多的诊断信息，因此在钡剂灌肠检查中是多余的。
