Tabrisky J, Herman M W, Torrance D J, Hieshima G B
AJR Am J Roentgenol. 1980 Aug;135(2):295-300. doi: 10.2214/ajr.135.2.295.
Chest radiographs obtained with mobile equipment for 240 kVp phototimed technique and conventional technique were compared in 161 patients. Features of interest were visualization of air space, interstitium, mediastinum, pleura and vessels, tracheobronchial tree, catheters and tubes. The 240 kVp system demonstrated consistently good visualization of central air passages, hilar contours, and pulmonary detail. It was superior to the conventional portable in eliminating respiratory motion, defining lung infiltrates, and localizing the endotracheal tube relation to the carina. The 240 kVp system had noticeable deficiencies in depicting calcifications, bone detail, and fat planes. These deficiencies were not of clinical significance. Although the equipment was compact, easily maneuverable, and simple to operate, the cassette holder was somewhat heavy--a detrimental but manageable factor. Another shortcoming was poor visualization of homogeneously opacified catheters within the mediastinum, although catheters with a dense radiopaque stripe alleviated this problem.
对161例患者使用移动设备采用240 kVp光控技术和传统技术进行胸部X线摄影，并对结果进行比较。感兴趣的特征包括气腔、间质、纵隔、胸膜和血管、气管支气管树、导管和管道的显影情况。240 kVp系统在显示中央气道、肺门轮廓和肺部细节方面始终表现良好。在消除呼吸运动、明确肺部浸润以及确定气管内导管与隆突的关系方面，它优于传统便携式设备。240 kVp系统在显示钙化、骨骼细节和脂肪层面方面存在明显不足。这些不足不具有临床意义。尽管该设备紧凑、易于操作且操作简单，但暗盒架有点重——这是一个不利但可控制的因素。另一个缺点是纵隔内均匀显影的导管显影不佳，不过带有致密不透射线条纹的导管可缓解这一问题。
