摘要
目的:分析64层螺旋CT冠状动脉扫描中影响成像质量的各种因素。方法:对89例怀疑冠心病或冠心病复查患者进行64层螺旋CT冠状动脉检查,回顾性分析成像质量,探讨心率及心率波动对冠脉成像质量的影响,pitch值与心率的关系,替代(override)功能的应用价值,从而优化扫描参数。结果:①心率及心率波动与冠脉成像质量成负相关;②心率与扫描/重建方式及pitch值存在相互对应关系;③心率替代功能的合理使用可以提高CT冠状动脉的成像质量。结论:通过控制心率及心率波动,选择心率替代功能,采取适当的扇区扫描/重建模式可以提高图像质量和冠状动脉诊断的可靠性。
Objective：To analyze the factors affecting image query of coronary angiography with 64 multi-slice CT.Methods：Eightynine patients with known or suspected CAD underwent CT coronary angiography using 64 multi-slice CT. The image quality in those eases was analyzed retrospectively to evaluate the influence of heart rate, fluctuation of heart rate during the scanning. The relationship between heart rate and the value of pitch was analyzed. The application value of the override function was discussed. Results： ① The patient＇ s heart rate and its fluctuation were negatively related to the coronary image quality; ② There was corresponding relationship between the value of pitch and segment scan/reconstruction mode according to the heart rate;③Correct use of override function could improve the image quality of coronary. Conclusion：The appropriate control of heart rate and fluctuation of it, the correct use of override function, and the corresponding sclection of segment scan/reconstruction mode according to the heart rate could improve the image quality and reliability of coronary angiorgaphy.
出处
《医学影像学杂志》
2007年第7期687-691,共5页
Journal of Medical Imaging
关键词
体层摄影术
X线计算机
冠心病
影像质量
质量控制
Tomography,X-ray computed
Coronary artery angiography
Image quallty
Quality control
作者简介
赵坤（1976-），男，山东省聊城市人，毕业于泰山医学院，技师，主要从事CT影像技术工作
