64排螺旋CT冠状动脉成像技术的体模实验

目的 通过冠脉体模实验,改善64排CT冠状动脉图像质量,使64排螺旋CT在冠状动脉疾病评估的价值得到进一步的提升.方法 本研究利用冠状动脉心脏模具,采用不同的心率、不同重建算法、图像重建相位窗,评价64排螺旋CT冠状动脉图像质量.结果 图像质量最佳心率为＜70bmp,心率波动＜10bmp.60%实验组,图像质量在R-R间期的75%相位(舒张中期)最好,心率快而波动小,冠状动脉成像采用单扇区重建算法,图像质量比较好.结论 心率、重建算法和图像重建相位窗是影响多排螺旋CT冠脉成像的主要参数,在应用中应适当运用以上的参数,才能获得优质的图像.

Phantom Experiment of 64-detector CT Coronary Artery Angiography Technique

Objecitive To improve the image quality of 64-detector CT coronary artery angiography, and to improve the value in evaluating the lesions of coronary artery through coronary artery phantom experiment. Methods Evaluating the image quality of 64-detector CT coronary artery angiography with different heart rate, reconstruction algorithm and different phase. Results The best image quality: heart rate<70bmp, fluctuation<10bmp. 60% experiment group: during 75%R-R (relaxation metaphase ), image quality was the best. Image quality was better with fast heart rate and low fluctuation, single sector reconstruction algorithm. Conclusions Heart rate, reconstruction algorithm, reconstruction phase time are the main parameters affecting image quality of multi-detector CT coronary artery angiography, high-grade image can be gotten by changing the parameters.