Objective   To investigate the diagnostic values of 64-slice spiral CT and post-processing technology in anomalous origin of unilateral pulmonary artery.   Methods   The data of 64-slice spiral CT results and processed results of 16 children (at a mean age of 18 months

ranging from 1 month to 6 years) with surgery or angiocardiography identified anomalous origin of unilateral pulmonary artery who admitted in our hospital from November 2008 to August 2010 were retrospectively reviewed.   Results   Left pulmonary artery anomalous origin from the right pulmonary artery was found in 6 cases

unilateral pulmonary artery from the aorta in 10 cases among which the right pulmonary artery anomalous origin in the ascending aorta in 5 cases

right pulmonary artery anomalous origin in the ascending aorta in 2 cases

right pulmonary artery absence completely and the blood supply of collateral from the descending aorta in 2 cases

and left pulmonary artery absence completely and the blood supply of collateral from the descending aorta in 1 case. In these 16 children

there were 36 cardiovascular deformities accompanying

and 13 other deformities

such as airway stenosis

lung

and thoracic deformities. Echocardiography diagnosed that there were 12 cases of anomalous origin of unilateral pulmonary artery

accompanied with 33 cardiovascular deformities

and diaphragmatic hernia in 1 case. Compared with the results of surgery or angiocardiography

the accuracy of 64-slice spiral CT and ultrasonography was 100% (16/16) and 75% (12/16) respectively in evaluating the anomalous origin of unilateral pulmonary artery

and was 94.87% and 84.61% in diagnosis of the number of cardiovascular malformations. There was statistically significant between the 2 diagnostic methods (P0.05).   Conclusion   64-slice spiral CT have high accuracy in diagnosis of anomalous origin of unilateral pulmonary artery in children

and display cardiovascular malformations

particularly vascular deformities and the trachea

lung

thorax and other circumstances well. It is a good noninvasive diagnostic tool.