Abstract: Objective To assess the significance of high resolution computed lomography (HRCT) scan in the diagnosis of the tracheobronchial tuberculosis.Methods The HRCT findings of 32 cases with tracheobronchi tuberculosis were analyzed,and observing the formal changes of the wall and cavity in tracheobronchial and the pathological changes in the lungs.Results The diagnosis rate with the changes in the tracheobronchial wall was 73.9%,of which the slight thickened of the tube wall was 54.4% and obviously was 19.8%,the changes in the cavity was 67.4%,of which the narrowing <50% was 41.3%,>50% was 19.6% and obliteration was 6.5%,meanwhile it were observed that the enlarged lyphnode around the tracheobronchi and mediastinum was 7 cases,mucus embolism in the tube was 12 cases,local enlargement of the tube was 5 cases,lobular emphysema was 18 cases and tuberculosis focus in the lung was 39 cases.Conclusion The HRCT scan was of clinical significance in observing the pathological changes of tracheobronchi and evaluating the relationship between the lung focus and tracheobronchi lesions,prepare doing the FB examining for the weak patients and evalute the prognosis of the patients.

Key words: Tuberculosis,tracheobronchial/diagnosis, Tomography,X-ray computed