Objective To evaluate the value of cardiovascular digital imaging and echocardiography in diagnosis of transposition of the great arteries.Methods Thirty cases of transposition of the great arteries were examined with cardiovascular digital imaging technique,two-dimensional echocardiography and color Doppler.11 cases of them underwent surgery.A comparison was made between the data obtained and surgical findings.Results The rate of coincidence of digital imaging and echocardiography with operation in diagnosing transposition of the great arteries was 92.3%(36/39)and 84.6%(33/39) respectively.Both echocardiography and cardiovascular digital imaging techique could clearly show the abnormalities of the heart and great vessels.Echocardiography was sensitive to valvular pathological changes,though cardiovascular digital imaging was superior to echocardiography in demonstrating abnormalities of great arteries and systemic-pulmonary collateral circulations.Conclusion Combination of echocardiography with cardiovascular digital imaging technique can greatly improve the rate of diagnostic accuracy for transposition of the great arteries.

Objective To analyze the CT appearances and the classification of gray matter heterotopia.Methods The clinical and CT data of 26 cases with gray matter heterotopia were retrospectively reviewed,11 were males and 15 were females,ranged in age from 2 days to 9 years with a mean of 2.6 years.Results The classification of heterotopia included:(1)Subependymal heterotopia in 14,5 cases with encephaloceles,1 case with Dandy-Walker malformation and 1 case with arachnoid cyst of cisterna megna.(2)Subcortical heterotopia in 7,4 cases with callosal agenesis were accompanied.(3)Band heterotopia in 5.Conclusion CT scan can not only reveal the appearances of the subependymal,subcortical and band types heterotopia,but also show other associated abnormalities.

Objective To study the appearances of split cord malformation(SCM)and evaluate the diagnostic value of CT for SCM.Methods Clinical and CT data of 48 cases with SCM were analyzed retrospectively ,21 were males and 27 were females,ranged from 1 day to 8 years with a mean of 11.6 months. All cases evaluated by plain CT with coronal and sagittal reconstructions.Results Type I accounted 75%, consisted of two hemicords, each contained in its dural tube and separated by a rigid median septum .TypeⅡaccounted 25%, consisted two hemicords contained in a single dural sac separated by a non-rigid, fibrous median septum. Associated abnormalities: tethered cord syndrome(n=38), syringomyelia(n=9), intradural lipomas(n=10), meningocele(n=18).Conclusion CT can clearly demostrate the position, the septum and the shape of the SCM, as well as associated abnormalities.