气管支气管树腺样囊性癌(adenoidcysticcarcinoma ,ACC)在较为罕见,是气管支气管树原发肿瘤中第2大类[1,2 ] 。尽管最初定义为支气管腺瘤,但是,事实上气管支气管树ACC属于1种恶性肿瘤,因此,准确的术前影像描述和分期是非常必要的。传统CT检查有一定的缺欠,螺旋CT(SCT) [3 ,4] Adenoid cystic carcinoma (ACC) is a rare complication of tracheobronchial tree adenoid cystic carcinoma (ACC). It is the second major category of tracheobronchial tree primary tumors [1,2]. Although originally defined as a bronchial adenoma, in fact, the tracheobronchial tree ACC belongs to a type of malignancy. Therefore, accurate preoperative image description and staging are necessary. Traditional CT examination has some defects, spiral CT (SCT) [3,4]