Abstract: Objective To explore the value of multi-slice CT post-processing technique in diagnosis of bronchial tuberculosis, comparative analysis of the results of virtual bronchoscopy and bronchoscopy. Methods From October 1, 2011 to October 31, 2012, multi-slice spiral CT images were performed in 100 adult bronchial tuberculosis patients confirmed by the bacteriological examination and bronchoscopy．After lung spiral CT scanning, all original images were transferred to workstation for image post-processing．The best depictive MPR, VR, VE images were acquired to observe all the image characteristics（stenosis and wall thickening） of the bronchial branches and bronchial stenosis and bronchial wall ulcers, congestion, proliferation of granulation. Original axial images are the control group and post-processing images are the experimental group. Statistical analysis used SPSS 19.0. Results The rates of multi-planar reconstruction images corresponding to the stricture and abnormal thickening of the bronchus was 98.0%(98/100), 90.0%(90/100), the rates of original image corresponding to the stricture of bronchus was 69.0%(69/100), 56.0%(56/100). There was significant difference between two groups(χ²=6.67, P＜0.05). The rates of fibreoptic bronchoscopy images corresponding to the stricture and pathology change of the bronchus was 77.0%(77/100), 75.0%(75/100), the rates of CT virtual endoscopy images corresponding to the stricture and pathology change of the bronchus was 73.0%(73/100), 62.0%(62/100). No significant difference between the two groups(χ²=0.334, P＞0.05). Conclusion Images of multi-slice spiral CT could accurately demonstrate the bronchial tuberculosis，and provide scientific and objective foundation for early detection and the formulation of clinical treatment programs.

Key words: Tuberculosis, bronchi/radiography, Tomography, spiral computed, Imaging, three-dimensional