Wandtke J C
Department of Radiology, University of Rochester Medical Center, NY 14642-8648.
Radiology. 1994 Jan;190(1):1-10. doi: 10.1148/radiology.190.1.8043058.
Bedside chest radiography is one of the most frequently performed radiologic examinations, yet it is the examination with the most variation in image quality. The need to improve the quality of this examination has long been recognized, but it is a difficult problem to solve. Critically ill patients must undergo bedside chest radiography almost daily. These examinations are useful 76%-94% of the time. A national survey revealed that there is a wide variation in the methods used to perform bedside chest radiography, indicating that there is no excellent preferred technique. The reduced image quality is due to scatter radiation. The scatter fraction is about 0.95 in the mediastinum and is about 0.66 in the lung. When grids are used, the image quality is improved; acceptance has been slow, however, because the grid is frequently misaligned. Storage phosphor imaging/computed radiography with grids is a technology improvement that almost completely solves this problem. Radiologists should be sure to optimize the current techniques, as well as provide prompt examination reporting.
床边胸部X线摄影是最常进行的放射学检查之一，但却是图像质量差异最大的检查。提高此项检查质量的需求早已得到认可，但这是一个难以解决的问题。重症患者几乎每天都必须接受床边胸部X线摄影。这些检查在76% - 94%的时间内是有用的。一项全国性调查显示，进行床边胸部X线摄影的方法存在很大差异，这表明没有一种极佳的首选技术。图像质量下降是由于散射辐射。在纵隔中散射分数约为0.95，在肺部约为0.66。使用格栅时，图像质量会得到改善；然而，其接受程度一直较慢，因为格栅经常未对准。带有格栅的存储磷光体成像/计算机放射摄影是一项技术改进，几乎完全解决了这个问题。放射科医生应确保优化当前技术，并及时提供检查报告。
