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Objective To evaluate the value of MDCT on diagnosis of congenital vascular rings on children.Methods Retrospective analysis on 57 cases of congenital vascular rings,which underwent MDCT during Oct.2008 to May.2016 in Beijing Anzhen Hospital Affiliated to Capital Medical University.27 males,30 females ; age from 29 days to 10 years,mean age 1.64 years,42 cases are not beyond 1 year.All the results are compared with that of the echocardiogram or record of the surgery.The CT data are read and reconstructed with multiplanar reconstruction(MPR),maximum intensity projection(MPR),minimum intensity projection(MinIP),volume rendering(VR).The image quality is evaluated and the diagnostic value and the standard diagnostic program are discussed.Results Of 57 cases of vascular rings: There are 7 cases of pulmonary artery sling(12.28%),12 cases of right aortic arch/aberrant left subclavian artery(21.05%),24 cases of left aortic arch/aberrant right subclavian artery(42.11%),14 cases of double aortic arch(21.05%).53 cases(92.98%)combine with other cardiovascular or pulmonary malformations.Every malformation is revealed clearly and proved by echocardiogram.Of 4 cases(7.02%)without any other malformation,3 cases combine tracheal stenosis.A pulmonary artery sling is proved by surgery; the other 3 cases are double aortic arch.All the images of 57 cases could be reconstructed well.MPR & VR show the origin,shape,and whole course of vascular rings directly; MinIP & VR could display the shape,width and development of trachea,reveal the relationship between vascular rings,trachea and esophagus.It is important to show and measure the component vascular of the ring.We should pay attention to the whole course of trachea and esophagus,especially those segments which are close to the ring vascular.The tracheal stenosis as well as intra-cardio anatomy malformations should be measured on MPR images if existed.According to the segmental analysis method,comes the overall final diagnosis.A standard diagnostic program on vascular ring is proposed.Conclusion MDCT axis images with various 3D post processing methods could reveal the compose of vascular rings and the relationship between vascular rings,trachea and esophagus.Its an effective method.