个性化注射CT冠脉成像在心脏结构显示的价值

The Value of Individual Optimized Injection of Contrast Medium for 256-MDCT in Demonstration of Cardiac Anatomic Structures

目的:评价个性化注射方案与传统的注射方案的256层螺旋CT冠脉成像技术在显示心脏大血管的图像质量上的差异,进一步优化心脏大血管CT造影的造影剂注射的方案。方法:对随机行传统注射和个性化注射各50例进行256层螺旋CT冠状动脉成像的患者的影像学资料中的心脏和大血管显示情况进行回顾性分析。结果:①个性化注射组肺动脉与右心室(RV)CT值较传统注射组明显升高,具有统计学意义(P<0.05),而升主动脉、降主动脉、左心室(LV)的感兴趣区CT值差异无明显统计学差异(P>0.05)。②个性化注射组室间隔显示情况明显优于传统注射组(P<0.05)。结论:个性化注射组提高了右心的强化程度,使右心室及室间隔的结构得到良好的显示,能更好的满足临床诊断和进行治疗前、后的评价。

Purpose：To evaluate the feasibility of individually tailored protocols of multiphase contrast-saline mixture for higher quality of cardiac CT angiography,and to optimize the injection protocols.Methods：One hundred patients underwent coronary CT angiography（CTA） with 256-row MDCT in our institute were randomly divided into two groups（individual optimized injection of contrast medium and traditional injection of contrast medium）.The attenuation was measured in ascending aorta,descending aorta,pulmonary artery and right ventricular（RV） by two experienced radiologists.The data were analyzed between groups.Results：The mean CT value of pulmonary artery and RV cavity in group 2 was higher than group 1,which had statistical difference（P0.05）.The mean CT value of ascending aorta and descending aorta of the two groups had no statistical difference（P0.05）.For the visualization of interventricular septum（IVS）,group 2 was better than group 1（P0.05）.Conclusion： Individually tailored protocols can provide higher attenuation of RV,get clear visualization of RV and IVS,which can provide more information for clinic.