Krug B, Harnischmacher U, Krahe T, Fischbach R, Altenburg A, Krings F
Department of Radiology, University of Cologne, Germany.
Acta Radiol. 1995 May;36(3):284-9.
In 326 patients abdominal contrast radiographs were compared to digital luminescence radiographs (DLR) and conventional screen-film system ones. The digital exposure dose was 50% of the conventional. In DLR, 2 different types of postprocessed images were obtained from each data set. A display with low spatial frequency enhancement filtered to look like a conventional radiograph was compared to a display with high spatial frequency enhancement. Conventional and DLR images were evaluated randomly and separately by 4 radiologists by means of a questionnaire. DLR proved to be diagnostically equivalent to the conventional technique with the exception of a slightly diminished visibility of the mucosal pattern. High spatial frequency enhancement did not provide additional diagnostic information and should be dispensed with in abdominal examinations.
对326例患者的腹部造影X线照片与数字荧光X线照片（DLR）及传统的增感屏-胶片系统照片进行了比较。数字曝光剂量为传统剂量的50%。在DLR中，从每个数据集获得了2种不同类型的后处理图像。将经过低空间频率增强滤波处理后看起来像传统X线照片的显示器与经过高空间频率增强处理的显示器进行了比较。4名放射科医生通过问卷调查对传统图像和DLR图像进行了随机、单独评估。结果证明，除了黏膜图案的可见度略有降低外，DLR在诊断上与传统技术相当。高空间频率增强并未提供额外的诊断信息，在腹部检查中应予以摒弃。
