Glazer H S, Anderson D J, DiCroce J J, Solomon S L, Wilson B S, Molina P L, Sagel S S
Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO 63110.
Radiology. 1991 Sep;180(3):839-44. doi: 10.1148/radiology.180.3.1871304.
The major fissures of the right and left lungs were studied with standard computed tomography (CT) (10-mm-thick sections) and thin-section CT (2-mm-thick sections) in 50 patients. On standard CT scans, the major fissures were seen in 90%-100% of cases at each of three selected levels. They usually appeared as hypoattenuating bands and less often as lines or hyperattenuating bands. Although in most cases the major fissure was seen as a line on thin-section CT scans, this appearance was more common in the upper portion of the left major fissure than in the upper portion of the right major fissure. A "double-fissure sign" was most frequently seen at the base of the left lung; however, the sign was also seen at higher levels, with approximately equal frequency in the right and left lungs. An incomplete major fissure was noted in the right lung in 32 cases (64%) and in the left lung in 26 cases (52%). The upper and middle portions of the left major fissure were less frequently incomplete than were the comparable portions of the right major fissure. Thin-section CT provided better delineation of the major interlobar fissures than did standard CT.
对50例患者的左右肺主要裂采用标准计算机断层扫描（CT）（10毫米厚层）和薄层CT（2毫米厚层）进行研究。在标准CT扫描中，在三个选定层面的每一层，主要裂在90%-100%的病例中可见。它们通常表现为低密度带，较少表现为线或高密度带。虽然在大多数情况下，主要裂在薄层CT扫描中表现为线，但这种表现在左肺主要裂的上部比在右肺主要裂的上部更常见。“双裂征”最常见于左肺底部；然而，该征象在更高层面也可见，在左右肺中的出现频率大致相等。右肺有32例（64%）出现不完全主要裂，左肺有26例（52%）出现不完全主要裂。左肺主要裂的上部和中部比右肺相应部分较少出现不完全情况。与标准CT相比，薄层CT能更好地显示主要叶间裂。
