To discuss the value of MSCT and MPR, CPR in dignosis of bronchial foreign body of children.

10 cases of bronchus foreign body, including 9 boys and 1 girl aged 1.2~10.0 years old, were given axial CT scan, MPR and CPR, which shew bronchial stenosis, foreignbody and their locations, indirect sign of blockage. All patients were examed with bronchoscopy after CT scan.

There were 8 cases located right primary bronchus and 2 cases left primary bronchus; 8 cases of foreign bodies with low density, including peanut kernel 3 cases, pistachios clothes 1 case, corn 1 case, melon seeds 1 case, bean 1 case and shredded meat 1 case, as 2 cases with high density which were tooth 1 case and fish thron 1 case. CT shew pneumonia 7 cases, pulmonary closure 4 cases, pneumonectasia 3 cases, mediastinal emphysema 4 cases, cutaneous emphysema 4 cases and aeropleura 2 cases.

Bronchus foreignbody in children can be shew clearly and located accurately by using MSCT, MPR and CPR, as various kinds of complication, which have great value in dignosis and differential diagnosis of bronchus foreign body.