多层螺旋CT冠状动脉造影:心率对最佳重建相位窗及图像质量的影响

被引:9
作者
孙红
惠萍
李天文
崔志鹏
胡兴和
王新明
机构
[1] 解放军总医院放射诊断科
[2] 解放军总医院放射诊断科 北京
[3] 北京
关键词
冠状血管造影术; 体层摄影术,X线计算机; 图像处理,计算机辅助; 图像质量;
D O I
10.13929/j.1672-8475.2005.04.011
中图分类号
R816.2 [心脏血管系];
学科分类号
1001 ; 100105 ; 100207 ; 100602 ;
摘要
目的探讨心率对16层螺旋CT冠状动脉造影最佳重建相位窗及图像质量的影响。方法90例受检者行16层螺旋CT回顾性心电门控条件下冠状动脉造影,对原始数据进行RR间期75%及10%~90%(间隔10%)多个时相重建,按心率≤65bpm和>65bpm分为2组,图像质量分为3级。结果第1组图像质量为Ⅰ级的冠脉比率(82.2%)显著高于第2组(47.4%),Ⅲ级者则相反(5.3%和22.4%)。两组中图像质量为Ⅲ级的冠脉共计45支,占总数的12.5%。LAD、LCx和RCA在75%相位窗显示最佳者居多,随心率增加,75%相位窗显示最佳者减少(第1、2组分别为92.3%和61.4%)。15支冠状动脉在不同相位窗重建互相弥补。结论对于大多数心率≤65bpm者,各支冠状动脉能同时在75%相位窗最佳显示;最佳重建相位窗和互补相位窗的选择可提高冠脉的显示率。
引用
收藏
页码:274 / 278
页数:5
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