Clinical Application Value Investigation Of 5 Horizontal Section Analytic Methods In 64-slice SCT Diagnosing Congenital Heart Disease

Objective: To explore the clinical practice value of using heart large vessels 5 horizontal section analytic methods in 64-slice SCT diagnosing congenital heart diseaseMethods and Materials: 60 patients with congenital heart diseases underwent 64-slice SCT and UCG examination before operation, the results were confirmed by operation, Among these patienis, male:36,female:24,age: three day～45 years old,mean age: 12years old. 64-slice SCT of GE company was applied in our study. We adopted the technique of Bolus Tracking in enhancement scarming. Scanning scope was from superior aperture of thorax to 3cm under the diaphragm surface. The original images of all the patients were reconstructed using multiplanar reconstruction(MPR),maximum intensity projeetion (MIP) and volume rendering (VR), and 2～3 kinds of good post-processing methods were picked out according to score. The lesion size measured by 64-slice SCT were compared with UCG measurements,surgical measurements. Results: 1. The capability of 64-slice SCT in showing the different structural abnormalities of various segments of congenital heart disease. 33 abnormalities were found and 7 abnormalities were missed by 64-slice SCT on atrial level. The diagnostic sensitivity was 82.5%. 5 abnormalities were found and 23 abnormalities were missed by 64-slice SCT on atrioventricular connection level. The diagnostic sensitivity was 14.9%. 88 abnormalities were found and 1 abnormality was missed by 64-slice SCT on ventricular level. The diagnostic sensitivity was 98.9%. 39 abnormalities were found and 5 abnormalities were missed by 64-slice SCT on heart-great vessels connection level. The diagnostic sensitivity was 88.6%. 59 abnormalities were found and 2 abnormalities were missed by 64-slice SCT on great vessels level. The diagnostic sensitivity was 96.7%. 2. The quantitative diagnostic capability of 64-slice SCT in diagnosing the lesion size. The measurement of 64-slice SCT was compared with UCG and surgery on 29 patients with ASD and 31 patients with VSD . There was no significant difference. The measurement of CT was compared with UCG on 19 patients with RVOT and 26 patients with right ventricular thickening and 94 abnormalities of pulmonary arteries. There was no significant difference. 3. The best post-processing techniques in showing the different abnormality of various segment of congenital heart disease on 64-slice SCT. Axial MPR and four-chamber MPR were betterly post-processing techniques showed abnormalities of atrium level and ventricle level and atrioventricular connection but with bad display effect by MIP and VR. There was their own suitable post-processing techniques in different malformation on heart-great vessels connection level. VR was the most intuitive to show malformations of large vessels level.Conclusion: 1. Thinking of diagnosing congenital heart disease is clarifier than traditional analysis and improve the diagnostic sensitivity with 5 horizontal section analytic method on 64-slice SCT. 2. 64-slice SCT and UCG basically have the same high sensitivity in diagnosing malformations of atrial level and ventricular level and heart-great vessels connection level,the sensitivity of 64-slice SCT in diagnosing malformations of great vessels level surpasses obviously UCG's,and 64-slice SCT diagnostic sensitivity is less than UCG's in the level of atrioventricular connection level where is easy to occur valve dysfunction. 3. 64-slice SCT can accurately display deformity of 5 segments level, which can provide great help for surgical operations. 4. The quantitative diagnostic capabilities is high with CHD by 64-slice SCT, and 64-slice SCT can be used as reliable and noninvasive examination method in clinical diagnosis.