Varicose, cystic, and mixed bronchiectasis. The lesion's distribution, appearance, relationship with accompanying disease and the factors of CT technique which influence the diagnosis were studied for each group. 采用四型分法即柱状扩张型、曲张型、囊状扩张型、混合型对其进行分类,探讨各型的分布、CT表现及其与伴随病变的关系,CT技术因素对诊断的影响。