Berkmen Y M, Auh Y H, Davis S D, Kazam E
Department of Radiology, New York Hospital-Cornell Medical Center, NY 10021.
Radiology. 1989 Mar;170(3 Pt 1):647-51. doi: 10.1148/radiology.170.3.2916016.
The minor fissure was studied with thin computed tomographic (CT) sections in 40 patients. It was absent in eight (20%) and seen in 32 (80%) patients; of these 32 the fissure was complete in seven (22%), incomplete in 23 (72%), and of indeterminate completeness in two (6%). Appearance of the minor fissure on CT scans can be categorized into two major configurations, which are determined by variation in contour of the middle lobe upper surface. The location of the highest point along this surface is either medial (type I configuration) or lateral (type II configuration). The lowest tributary of the vein draining the anterior segment of the upper lobe was seen in 75% of the patients. This vessel was a reliable landmark in delineating boundaries between upper and middle lobes, even when the fissure was radiologically incomplete or absent. In the authors' experience, familiarity with these configurations of the minor fissure has been useful in localization of a lesion in a lobe or determination of its possible extension beyond the fissure into the neighboring lobe.
对40例患者采用薄层计算机断层扫描（CT）对小裂进行研究。8例（20%）未见小裂，32例（80%）可见小裂；在这32例中，小裂完整的有7例（22%），不完整的有23例（72%），完整性不确定的有2例（6%）。CT扫描上小裂的表现可分为两种主要形态，这取决于中叶上表面轮廓的变化。沿该表面最高点的位置要么在内侧（I型形态），要么在外侧（II型形态）。75%的患者可见引流上叶前段静脉的最低分支。即使在放射学上小裂不完整或不存在时，该血管也是划分上叶和中叶边界的可靠标志。根据作者的经验，熟悉小裂的这些形态有助于确定叶内病变的位置或确定其可能超出小裂向相邻叶扩展的情况。
