Abstract

目的 探讨心率及重建相位窗对多层螺旋CT冠状动脉造影图像质量的影响.方法80例健康体检者行16层螺旋CT回顾性心电门控条件下冠状动脉造影.结果每位患者的4条冠状动脉分支(左冠状动脉主干、左前降支、左回旋支、右冠状动脉)分别用于图像质量分析.心率≤60次/min者,有82.1%(46/56支)的图像可用于诊断;心率61~70次/min者,有63.4%(104/164支)的图像可用于诊断;心率71~80次/min者,有41.2%(28/68支)的图像可用于诊断;心率80次/min以上者有31.2%(10/32支)的图像可用于诊断.左冠状动脉前降支在60%~70%的重建相位窗时图像质量最佳,左冠状动脉回旋支在50%~60%时最佳,右冠状动脉重建相位窗为50%~70%较满意.结论心率及重建相位窗对多层螺旋CT冠状动脉造影图像质量有重要影响作用。

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