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目的探讨如何准确、合理运用GE Light speed 16 CT扫描技术及重建技术对急性胰腺炎的诊断。方法扫描前30 min口服三种胃肠道对比剂:水、2%、5%泛影葡胺溶液300 mL,扫描前再服水,2%、5%泛影葡胺溶液300mL。扫描参数120 kV,320 mA,层厚2~5 mm,先行常规扫描,后行双期增强扫描:①20~30s内先行动脉期扫描;②40~50s再行平衡期扫描。再用三维重建(3D)MPR进行后处理。结果急性胰腺炎时表现胰腺弥漫性增大,密度低,轮廓不清,边缘模糊,周围渗出积液等改变。胃肠道对比剂以2%泛影葡胺溶液后行增强扫描所得图象最清晰,能提高阳性诊断率。结论GE Light speed 16 CT对急性胰腺炎及并发症显示细微、准确,有较特征性表现,对其诊断价值较大。
Objective To explore how to diagnose acute pancreatitis accurately and reasonably using GE Light speed 16 CT scan and reconstruction technique. Methods Three gastrointestinal contrast agents were orally administered 30 min before scanning: 300 mL of water, 2%, 5% diatrizoate meglumine, and 300 mL of 2%, 5% diatrizoate meglumine solution before scanning. Scanning parameters 120 kV, 320 mA, layer thickness 2 ~ 5 mm, the first conventional scan, double line after the enhanced scan: ①20 ~ 30s first arterial phase scan; ②40 ~ 50s and then the balance of the scan. Then use the three-dimensional reconstruction (3D) MPR for post-processing. Results of acute pancreatitis showed increased diffuse pancreas, low density, poorly defined, fuzzy edge, peripheral effusion effusion and other changes. Gastrointestinal contrast agent with 2% diatrizoate solution enhanced scan the most clear images, can improve the positive diagnostic rate. Conclusion The GE Light speed 16 CT showed subtle, accurate and more characteristic manifestations of acute pancreatitis and complications, which is of great diagnostic value.