16层螺旋CT冠状动脉成像技术的探讨

Exploration of the technique of 16-slice spiral CT coronary angiography

目的:探讨16层螺旋CT冠状动脉血管成像技术。材料与方法:52例受检者行MSCT冠状动脉血管成像检查,使用美国GE公司16层螺旋CT,采用电影扫描序列,层厚为1.25mm,螺距为0.275∶1,对比剂(欧乃派克)2mlkg,注射速率3.5～4mls,采用VR、MPR、CPR、VE进行图像后处理重建,显示冠状动脉主干及主要分支。结果:心率平稳,心率55～75次分,MSCT对冠状动脉主干及主要分支显示达到诊断要求;心率大于80次分时,冠状动脉的主要分支显示不清。结论:心率平稳且小于75次分,使用合适的对比剂及扫描参数,MSCT可满意显示冠状动脉主干及主要分支,可作为冠状动脉粥样硬化疾患的筛选,对血管搭桥和内支架放置术后复查的评价有较高临床价值。

Objective: To investigate the technique of 16-slice spiral CT coronary angiography. Materials and Methods: Fifty-two patients underwent MSCT coronary angiography, with GE MSCT scanner, slice thickness 1.25mm, helical pitch 0.275∶1, contrast media(Omnipaque) was injected intravenously(2mlkg) at the speed of 3.5～4mls. The reconstructed images were then processed into volume rendering(VR) and multiplanner reconstruction(MPR) and curved planner reconstruction(CPR) and virtual endoscopy(VE). Results: With MSCT angiography of coronary arteries good image quality was achieved in patients with a heart rate of <75 beats per minute. Conclusion: Under given conditions, good coronary artery image quality can be obtained with MSCT angiography. MSCT coronary artery image could be used for screening of coronary atherosclerotic heart disease. It has high value in the evaluation of post-operation as well as graft vessel and stent.