ObjectiveTo evaluate the diagnostic value of multi-slice CT (MSCT) and multi-dimensional reconstructions for congenital pulmonary stenosis (PS) in children.MethodsThe enhanced thin CT images of 33 patients with PS were retrospectively analyzed,the data was transmitted to the workstation for multi-planar reformation ( MPR),volume rendering technique (VRT) and maximum intensity projection (MIP).The CT imaging features of PS were analyzed combining with operation resul ts and Ultrasonic Cardiogram (UCG).ResultsIn 33 cases of PS,there were 17 cases with pulmonary valve stenosis (PVS),10 cases with right ventricular infundibulum stenosis (RVIS),and 6 cases with pulmonary trunk stenosis (PTS).The first two were correctly diagnosed by UCG,5 cases of PVS and Icases of RVIS were correctly diagnosed by MSCTA,the later was correctly diagnosed by UCG and MSCTA.In 14 cases with collateral circulations between aorta and pulmonary artery ( APC ),all were correctly diagnosed by MSCTA,only 3 case was diagnosed by UCG,1 case was misdiagnosed as PDA.UCG can clearly demonstrate the others intra-cardiac deformities,such as ASD,VSD,RVH,PFO,SV,DORV,TECD and TBD,the accuracy rate of MSCTA was 39.4％,and MSCTA can clearly demonstrate the origin,course and diameter of extracardiac vascular abnormalities,such as PDA,RAA,TGA,TAPVD,CoA,PLSV and VLSA,the accuracy rate of UCG was 697％.ConclusionsMSCT and multi-dimensional reconstruction were a kind of non-invasive method,it was a good approach for extra-cardiac vascular malformations and APC in PS.Combining with UCG,it can further be used to improve the diagnostic accuracy of intra-cardiac malformation and supply diagnostic evidence for clinical treatment.

Objective To investigate the clinical value of contrast-enhanced ultrasonography in early diagnosis of liver cirrhosis and small hepatocellular carcinoma.Methods 60 patients with cirrhosis and small hepatocellular carcinoma were diagnosed by pathological examination.The number of lesions in the liver,the mode of enhanced expression were recorded,and all lesions were evaluated as benign and malignant before and after contrast-enhanced ultrasound.Results A total of 60 patients with 70 lesions were detected,all of which were less than 3cm.50 low differentiated carcinoma lesions,accounted for 71.42％,the contrast mode performance for arterial phase rapid enhancement,parenchymal lesion signal was lower than that of normal liver parenchyma,fast forward and fast.14 well differentiated carcinoma lesions,accounted for 20.00％,contrast mode performance for the arterial phase rapid enhancement,parenchymal Iesion signal higher than that of normal liver parenchyma,namely fast and slow.Compared with before the contrast,the malignant grade of the lesion was significantly increased (x2 =4.525,P ＜ 0.05).Conclusion Ultrasound contrast in the early detection of liver cirrhosis with small liver cancer has high sensitivity,it is helpful to find lesions,evaluate the benign and malignant lesion,it can be used as a imaging method in diagnosis of small hepatocellular carcinoma.