Abstract: Virtual bronchoscopy(VB) plays an important role in the evaluation of chest diseases,but as the main key technology,airway tree segmentation method has problems of inaccurate and leakage phenomenon.Therefore,the airway trees segmentation based on region growing method was proposed.Firstly,region growing method is used to extract the main branch.Secondly,it extracts the sub-branch and deletes the pseudo branch according to the quality evaluation function.The experiment results show that the robust airway segmentation method can extract the complete lung airway tree simply,robustly and effectively with magnitude 5 bronchus,which solves the bronchial rupture and segmentation leakage problems.

Key words: Virtual bronchoscopy,Airway trees segmentation,Region growing method,Candidate branch,Evaluation function