新しい増感紙HG-M, XG-Sの画質と量子検出効果

抄録

Imaging characteristics of the new screens HG-M(AD system) and XG-S(EX system) were examined in terms of both image quality and x-ray utilization efficiency. For the evaluation of these screens, NEQ(u), which represents an overall evaluation of the imaging properties of the screen-film system, was measured to determine image quality, and DQE(u), which represents detective quantum efficiency, was measured to determine x-ray utilization efficiency. The conventional screen HR-8, which has similar sensitivity, was examined in the same way, and the results were compared with those of the new screens. The new screens were found to have inferior graininess but superior sharpness, NEQ(u), and DQE(u) in comparison with the HR-8 screen. These results indicate that the new screens improve both image quality and detective quantum efficiency. Therefore, the HG-M and XG-S screens, which include the new phosphor technology, can be considered new-generation screens with improved image quality performance for sensitivity. In use, these screens provided superior image quality to the conventional screen with identical exposure.