目的  探讨基于CT三维重建的肩峰折角形态学分型及测量分析。   方法  收集278例成年人CT三维重建肩胛骨形态数据，分析不同类型间测量数据的差异，明确其统计学意义，总结其形态学特点进行肩峰折角分型，探讨其在肩峰下撞击综合征诊治中的意义。 

  结果  本研究将肩峰折角分为3型 (C型、L型和双角型)。其中L型最多，占48.56%，其次为C型，双角型最少；双角型a点肩峰厚度大于其余两型 (P<0.05)；双角型的肩峰倾斜角大于C型 (P<0.05)及L型 (P<0.05)。   结论  肩峰折角的分型与解剖学参数具有明显差异，且差异具有统计学意义，这对明确肩峰下撞击综合征的病因及其临床诊治具有一定的指导意义。 

Objective  To study the acromial angle morphologic type and measurement analysis based on CT 3D reconstruction.    Methods  Totally 278 cases of adult CT three-dimensional reconstruction of the shoulder morphological data were collected, and the measurement data of the different types was analyzed, its statistical significance was clarified, and the morphological characteristics to division the type of acromial angle were summarized, its diagnosis and treatment under the acromion impingement of guiding significance were discussed.    Results  The acromial angle was divided into three types (C shaped acromial angle, L shaped acromial angle, and double angle shaped acromial angle). Among them, L type was the most, accounting for 48.56%, followed by C type, and double angle type was the least. In comparison of the breadth of the acromion and the length of the acromion, L type was significantly longer than C type (P<0.05). The thickness of acromion at a point of the double angle shaped acromial angle was greater than that of the other two type (P<0.05). In the comparison of ∠a, the double-angle type was greater than the C type (P<0.05), and the C type was greater than the L type (P<0.05).    Conclusion  There are significant differences in the classification and anatomical parameters of acromial angle, and the differences are statistically significant. It has certain guiding significance to the etiology and clinical diagnosis and treatment of subacromial impingement syndrome.