目的  为影像学诊断提供肺叶间裂的变异资料。  方法  运用64层螺旋进行CT扫描,选择　451例肺部无明显病变或手术影响观察肺叶间裂的患者，应用MPR技术显示、观察并统计肺叶间裂及其变异情况。  结果  451例被检查者中有肺叶间裂变异者占69.18%（312例）；其中，右肺变异者占62.53%（282例），左肺变异者占18.18%（82例）。右肺282例中177例存在一种变异，105例合并其它变异。左肺82例中25例存在一种变异，57例均合并其它的变异。肺叶间裂变异存在3种类型：（1）肺叶间裂不全,其中右水平裂不全占45.45%(205例),右斜裂不全占19.51%(88例),左斜裂不全占16.41%(74例)；（2）肺叶间裂缺如:其中右水平裂缺如占0.89%(4例),右水平裂合并斜裂缺如占0.22%(1例),左斜裂缺如占0.44%(2例);（3）附属裂：存在附属裂的占13.97%（63例）,其中右肺附属裂占11.97%(54例),左肺附属裂占2.44%　(11例)。  结论  64层螺旋CT扫描结合多平面重组技术能显示肺叶间裂各种变异，可为临床学科提供可靠、有价值的影像学资料。

        Objective  To provide variation data of pulmonary fissure for imaging diagnosis. Methods   451 patients without obvious lesions and operation history were performed a 64-slice multidetector CT scan with the thickness of 0.6 mm, and then the raw data were reformed at the sagital and coronal orientation with the slice thickness of 3mm. All of the reformed images were observed and the features of the pulmonary fissure were counted and analyzed.  Results  Variations of pulmonary fissures appeared in 312 cases (69.18%), among them, 282 cases (62.53%) were right variation, in which 177 cases were single variation, 105 were complex variation. While 82 cases (18.18%) were left variation, in which 25 cases were single and 57 were complex. Three types of variations were observed: type 1, incomplete pulmonary fissures, 45.45% in right horizontal fissure and 19.51% in right oblique fissure, and 16.41% in left oblique fissure; type 2, pulmonary fissure absence, 0.89% in the right horizontal fissure, 0.22% in the right oblique fissure and the horizontal fissure, 0.44% in the left oblique fissure; type 3, accessory fissure, with the occurrence rate of 13.97%, 11.97% in the right, 2.44% in the left.  Conclusions  It is an efficient method to observe and classify the variations of the pulmonary fissures adopting 64-slice MSCT scan combined with MPR technique, which will provide reliable and useful imaging information for correlative subjects.