摘要
目的探讨团注追踪法64层螺旋CT增强扫描技术在主动脉成像中的应用价值。方法对39例拟诊为主动脉病变的患者采用团注追踪法CT增强扫描。以3．5～4ml／s速率分别注射100ml非离子型对比剂和40～50ml生理盐水。计算夹层组和非夹层组主动脉平均强化值的均数和标准差，并进行统计学比较。将两组的图像质量按优、良、差和失败进行分级并行比较。结果非夹层组与夹层组真腔的主动脉平均强化值比较，差异在统计学上无显著性意义（P〉0．05）；与夹层组假腔的主动脉平均强化值比较，差异有显著性意义（P=0．01）。夹层组真、假腔主动脉平均强化值比较，差异有显著性意义（P=0．01）。两组图像质量比较，差异在统计学上无显著性意义（P〉0．05）。结论64层螺旋CT团注追踪法主动脉成像能够满足临床诊断主动脉疾病的需要，扫描延迟时间的选择、监测平面的设定以及后续生理盐水的使用，是主动脉CTA检查成功的重要因素。
Objective To investigate the value of 64-slice spiral CT with bolus tracking in aortic angiography. Methods Thirty-nine patients with suspect aortic diseases were evaluated with Siemens 64-slice CT scanner. All of scans were performed with the bolus tracking of 100 ml nonionic contrast material followed by flushing 40-50 ml of physiologic saline solution at 3.5-4 ml/s. Average value of aorta enhancement and its standard deviation over baseline were calculated for both group, with dissection and non-dissection. The imaging qualities in both groups were graded as excellent, good, poor and failure and were compared respectively. Results The mean value of aorta enhancement for non-dissection group was not sig- nificantly different from that in true channel of dissection group （P〉0.05）, but significantly different from that in false channel of dissection group （P=0.01） . In dissection group, the mean value of aorta enhancement in true channel differed significantly from that of false channel （P=0. 01）. The imaging quality of both groups was not significant different （P〉0.05）. Conclusion 64-slice CT angiography with bolus tracking can well display the aortic diseases. It is important to select the proper delay time, tracking planner and solution for aortic angiography.
出处
《中国医学影像技术》
CSCD
北大核心
2007年第1期77-80,共4页
Chinese Journal of Medical Imaging Technology
