摘要
目的分析与心率相关的64排螺旋CT冠状动脉成像中最合适的相位宽度。资料与方法选取110例回顾性心电门控CT冠状动脉检查患者,评价不同心率组(Ⅰ组,<60/min;Ⅱ组,60～62/min;Ⅲ组,63～65/min;Ⅳ组,>65/min)在R-R间期75%、60%～80%和40%～80%3个相位宽度中最佳重建相位的冠状动脉图像质量。结果Ⅰ、Ⅱ组在75%和60%～80%相位宽度图像质量高于Ⅲ、Ⅳ组(χ2=75.408,P<0.01),增加相位宽度至40%～80%,Ⅲ、Ⅳ组图像质量有明显改善。结论心率较高时增加重建相位宽度可提高64排螺旋CT冠状动脉成像的图像质量,而心率<63/min时适合用窄相位宽度扫描模式。
Purpose To determine the optimal phase window width（PWW）to heart rate （HR） in 64-slice CT coronary angiography（CTCA） . Materials and Methods A total of 110 patients undergone retrospective ECG-gating CTCA were enrolled in this study. The image quality of coronary artery of 4 different HR groups （groupⅠ60 beats per minute, groupⅡ 61～62 beats per minute,groupⅢ 63～65 beats per minute, groupⅣ 65 beats per minute） were evaluated respectively with optimal phase window within 3 different PWW（ 75%, 60%～80% and 40%～80% of R-R interval）. Results The image quality of coronary artery in groupⅠ and Ⅱ with PWW of 75% and 60%～80% was higher than that of group Ⅲ and Ⅳ. The image quality of group Ⅲ and Ⅳ obviously improved when PWW was widened to 40%-80%（χ2=75.408 P0.01）. Conclusion Widening PWW can improve image quality of 64-slice CT coronary angiography in higher heart rate, while it is better to use narrow PPW protocol when the heart rate is less than 63 beats per minute.
出处
《中国医学影像学杂志》
CSCD
北大核心
2011年第6期429-432,共4页
Chinese Journal of Medical Imaging
作者简介
通讯作者 孙红
