Mayr B, Ingrisch H, Anhalt G
Radiologische Klinik, Universität München.
Digitale Bilddiagn. 1988 Sep;8(3):128-32.
Imaging of the normal bronchial system by CT was examined in 75 patients while employing different imaging parameters. The main and lobar bronchi could be demonstrated almost without exception in the standard examination of the thorax. Segmental bronchi were delineated in an average of 81% of the cases (512 image matrix) or 74% (256 image matrix), respectively. The lowest identification rate was seen in the segmental bronchi of the middle lobe and lingula being 38% (512 image matrix) and 18% (256 image matrix), respectively. Increase of the magnification factor did not result in any significant improvement of imaging. An increase in the identification rate of the segmental bronchi of the middle lobe and lingula was achieved only after reducing the slice thickness from 8 mm to 4 mm, the yield being now 87% (512 image matrix) and 82% (256 image matrix), respectively, whereas the remaining segmental bronchi could be made to show up almost without exception. The standard parameters are sufficient for routine examination of the bronchial system. If imaging is diagnostically not satisfactory, reducing the slice thickness yields improved imaging, especially of small bronchi.
在75例患者中，运用不同成像参数对正常支气管系统进行CT成像检查。在胸部标准检查中，主支气管和叶支气管几乎均可显示。段支气管在平均81%的病例（512图像矩阵）或74%的病例（256图像矩阵）中可清晰显示。中叶和舌叶段支气管的识别率最低，分别为38%（512图像矩阵）和18%（256图像矩阵）。增大放大倍数并未显著改善成像效果。仅在将层厚从8毫米减至4毫米后，中叶和舌叶段支气管的识别率才得以提高，此时分别为87%（512图像矩阵）和82%（256图像矩阵），而其余段支气管几乎均可清晰显示。标准参数足以用于支气管系统的常规检查。若成像诊断效果不佳，减小层厚可改善成像，尤其是小支气管的成像。
