DIGITAL LUMINESCENCE RADIOGRAPHY AND CONVENTIONAL RADIOGRAPHY IN ABDOMINAL CONTRAST EXAMINATIONS

In 326 patients abdominal contrast radiographs were compared to digita l luminescence radiographs (DLR) and conventional screen-film system o nes. The digital exposure dose was 50% of the conventional. In DLR, 2 different types of postprocessed images were obtained from each data s et. A display with low spatial frequency enhancement filtered to look like a conventional radiograph was compared to a display with high spa tial 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 techn ique with the exception of a slightly diminished visibility of the muc osal pattern. High spatial frequency enhancement did not provide addit ional diagnostic information and should be dispensed with in abdominal examinations.