Abstract: To evaluate the clinical value of spiral CT multiple planarre construction(MPR) in the diagnosis of atypical airway foreign bodies in children. Method: Seventyone patients suspected of having airway foreign body received spiral CT multiple planarre construction. Results: All gained clear graphs. The imaging results demonstrated that airway foreign bodies located in trachea in 6 cases, in right primary bronchus in 16 cases, in right lobar bronchus in 5 cases, in left primary bronchus in 7 cases, in left lobar bronchus in 1 case and in both bronchus in 1 case, and nonforeign bodies in other 35 cases. Of the foreign bodies, 1 was proved to be ropy secretion by bronchoscopy. Conclusion: By MPR, the airway foreign bodies are well displayed. MPR may play an important role in the diagnosis and differential diagnosis of suspected airway foreign bodies in children.

Key words: Foreign bodies, Respiratory tract diseases, Tomography, Xray computed