使用计算机X线摄影术进行胸部检查时支架及导管的显影情况
Support line and tube visibility in chest examinations using computed radiography.
作者信息
Huda W, Belden C J, Webb L A, Palmer C K
机构信息
Department of Radiology, University of Florida College of Medicine, Gainesville 32610-0374, USA.
出版信息
J Digit Imaging. 1997 Aug;10(3):126-31. doi: 10.1007/BF03168600.
The visibility of support lines and tubes was compared in computed radiography (CR) and screen-film adult chest radiographs. Parameters investigated were radiation dose, image minification, and the use of unsharp mask enhancement. Five radiologists rated the visibility of support lines and tubes on a five-point scale ranging from 1 (entire course of line visible) to 5 (line not visible or only small portion seen). These CR results were compared with the visibility of support lines and tubes as assessed by the same readers for conventional screen-film radiographs (600 speed). Support line and tube visibility improved with image enhancement, image minification, and increasing radiation dose. At the same radiation exposure, support line and tube visibility of the screen-film combination was superior to that of standard CR images. Application of an unsharp mask enhancement algorithm to CR images, however, significantly improved support line and tube visibility in comparison to that obtained with the screen-film combination. It was concluded that unsharp mask processing is a valuable tool for improving the visibility of support lines and tubes in CR chest radiographs.
在计算机X线摄影（CR）和成人胸部屏-片X线摄影中，对支撑线和导管的可视性进行了比较。研究的参数包括辐射剂量、图像缩小以及使用锐化掩模增强。五位放射科医生对支撑线和导管的可视性进行评分，评分范围为1分（能看到线的整个行程）至5分（线不可见或仅能看到一小部分）。将这些CR结果与同一批读者对传统屏-片X线摄影（600感光度）评估的支撑线和导管可视性进行比较。支撑线和导管的可视性随着图像增强、图像缩小以及辐射剂量增加而改善。在相同的辐射曝光条件下，屏-片组合的支撑线和导管可视性优于标准CR图像。然而，与屏-片组合相比，将锐化掩模增强算法应用于CR图像可显著提高支撑线和导管的可视性。得出的结论是，锐化掩模处理是提高CR胸部X线摄影中支撑线和导管可视性的一种有价值的工具。
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