Bronchography Confirm the existance of bronchiectasis Clarify the subtype and extent ◆Cylindrical:近端与远端宽度相似，柱状， 或远端稍大，末端截断，远端分支不易充 盈 ◆cystic:重者呈葡萄串状 ◆varicose:粗细不均，管腔形态不规整