摘要
目的:比较对比剂浓度实时监控触发技术和小剂量峰值测试延迟触发技术在冠状动脉CTA成像的强化效果,探讨64排螺旋CT在成像中扫描技术的优化方案。材料与方法:在两种技术模式下完成237例冠状动脉CTA成像扫描检查,通过图像分析组间主、肺动脉CT密度差异、最佳对比剂符合率和后续血管重建成功率,分析评价两种扫描技术的显像质量差异。A组106例采用对比剂浓度实时监控触发技术模式,B组131例采用对比剂小剂量峰值测试(时间密度曲线)扫描模式。结果:A、B组间测得主动脉根部、肺动脉对比剂浓度具有统计学差异,p=0.028/p=0.015(p<0.05);其中B组最佳对比剂符合率和后续血管成功率均高于A组,分别达到94.3%和98.5%。结论:使用小剂量峰值测试延迟触发模式可以根据因人而异的个性化原则,有效避免个体差异的影响,在延迟触发扫描中寻求最佳的对比剂浓度,优化冠状动脉CTA成像强化效果和后续血管重建成功率。
Purpose： To compare the effect of contrast agents bolus-tracking with small dose test bolus-tracking, in order to optimizate the scanning technology with 64-slice spiral CT in coronary artery angiography. Materials and Methods： 237 cases of coronary artery CTA imaged by two different scanning modes, The group A （106 cases） adopted the bolus-tracking mode, and the group B （131 cases） adopted small dose test bolus-tracking mode. And then, several indicators were ob- served, containg CT density differences in artery and pulmonary artery, best coincidence rate of contrast agents, success rate in coronary artery angiography. Results ： The contrast agents difference between two groups was statistically significant （ P 〈 0. 05 ） ; Meanwhile, the group B had higher coincidence and success rate than group A. Conclusion： The small dose test bolus mode which could better honor the personalized principle and avoid the effection among the individuals, then observe the best dose of contrast agent, attain the excellent imaging quality and higher success rate.
出处
《现代医用影像学》
2015年第6期925-928,共4页
Modern Medical Imageology
基金
2014年惠州市科技计划项目(2014Y039)
