国际医学放射学杂志2012，Vol.35Issue(1)：5-9,5.DOI:10.3784/j.issn.1674-1897.2012.01.10102
中等心率下64层螺旋CT 前瞻性心电门控冠状动脉成像的可行性研究
64-MSCT coronary angiography with prospective ECG gating at intermediate heart rate
摘要
Abstract
Objective To evaluate robustness of coronary artery computed tomographic (CT) angiography withprospectively gated axial (PGA) CT technique at intermediate heart rate (65~75 beats per minute) using retrospectively gatedhelical (RGH) CT technique in 64-slice spiral CT. Methods 63 consecutive patients with heart rates (HR) of 65 to 75 bpm,heart rate variability of below 5 bpm underwent CT angiography with RGH technique (tube voltage was 120 kV and tubecurrent tailored to BMI). The 5% acquired data during each intermediate temporal window in the R-R interval were used toreconstruct images. The intermediate temporal window was 400 ms in the R-R interval at current mean HR, and the centre ofthe temporal window was 60%. All coronary artery segments were evaluated for image quality with 5-point scale. The meanimage quality score and the percentage of assessable coronary artery segments were used to evaluate diagnostic value on theselected temporal window. Results 822 coronary artery segments were depicted and were evaluated. The mean imagequality score was 4.15 ±0.72. The percentage of assessable coronary artery segments was 97.76% . Conclusion PGAcoronary CT angiography with proper revise image acquisition phase and padding time could offer assessable image quality atintermediate HR.关键词
体层摄影术,X线计算机/冠状动脉/图像处理/辐射剂量Key words
Tomography,X-ray computed/Coronary artery/Image processing/Radiation dose引用本文复制引用
赵磊,王泽锋,刘挨师..中等心率下64层螺旋CT 前瞻性心电门控冠状动脉成像的可行性研究[J].国际医学放射学杂志,2012,35(1):5-9,5.基金项目
内蒙古财政厅科研项目(NC20080018),内蒙古高等学校科学研究项目(NJZY07091) （NC20080018）
