多层螺旋CT重建技术在胆道梗阻中的应用价值

目的:探讨多层螺旋CT重建技术在胆道梗阻中的应用价值.材料和方法:收集47例临床证实的胆道梗阻患者的多层螺旋CT扫描数据并行胆道多平面重建(MPR)与曲面重建(CPR),将50例无胆系疾患又无胆道扩张的CT扫描数据作为对照,分别将两组间的MPR与CPR图像对胆道结构和胆管壁的显示效果以及对胆管系统的显示能力进行对比分析,再对47例胆道梗阻患者的CT胆道重建图像进行回顾性分析进一步评估其对梗阻部位和梗阻原因判断的准确性.结果:胆道梗阻组中MPR和CPR图像对胆道结构及胆管壁的显示效果优于非梗阻组,CPR图像对胆管系统的显示能力优于非梗阻组.多层螺旋CT胆道重建图像对梗阻原因判断的准确性为89.4%(42/47),对梗阻部位判断的准确性为100%.结论:多层螺旋CT胆道重建图像能够清楚地显示梗阻扩张的胆道结构、胆管壁情况和梗阻的部位,并能对大多数胆道梗阻的原因做出判断,在胆道梗阻性疾病的诊断中具有较好的应用和推广价值.

Evaluation of Patients with Obstruction of Biliary Tract by Multi-Detector Row CT Using Reconstruction Techniques

Purpose:To evaluate the role of multi - detector row CT(MDCT) using reconstruction techniques in the assessment of patients with obstructed diseases of biliary tract.Materials and Methods: 47 Patients with obstructed diseases of biliary tract confirmed clinically underwent MDCT and their reconstructed images of biliary tract including multi-planar reconstruction (MPR) images and curved planar reconstruction(CPR) images were compared with those of 50 patients without obstruction and dilatation of biliary tract.The display effect of biliary duct structure and biliary duct wall and the display ability of biliary tract by MPR and CPR images between the 2 groups were compared and analysed.The reconstruction images of biliary tract were analysed retrospectively to evaluate the location and possible causes of biliary obstruction.Results: The display effect of biliary duct structure and biliary duct wall in MPR and CPR images of the group with biliary obstruction is better than that of control group,and the display ability of biliary tract in CPR images of the group with biliary obstruction is also better than that of control group.The accuracy of localization and cause evaluation of obstruction by MPR and CPR images is 100% and 89.4% respectively.Conclusions: The MPR and CPR images of MDCT provide a good display of biliary duct structure,biliary duct wall and an accurate evaluation of obstruction localization.The reconstruction technique of MDCT such as MPR and CPR should be widely applied in the evaluation of biliary obstruction.