目的：采用双源CT的MinDose技术（MD-DSCT）及二维超声心动图分别评价并比较主动脉瓣狭窄患者的冠状动脉、瓣环直径及心功能。方法回顾性分析33例欲行换瓣治疗的主动脉瓣狭窄患者。MD-DSCT 检查仅于全 RR间期的10％间期全剂量曝光，于70％ RR间期双斜轴向图像重建。超声心动图及MD-DSCT 采分别测量左室射血分数（LVEF）和主动脉瓣环直径（AVAD）。结果所有患者 MD-DSCT 检查评价冠状动脉均获得良好效果。LVEF-2D与LVEF-MD-DSCT 有较强的相关性（ r ＝0．96，P ＜0．01）。AVAD-2D与AVAD-MD-DSCT 有较强的相关性（ r ＝0．91， P ＜0．01）。结论 MD-DSCT可以于术前一站式评价主动脉瓣狭窄患者的冠状动脉、LVEF以及AVAD。%Objective The purpose of this study was to assess and compare coronary artery ,AVAD and LVEF of aortic stenosis patients using MinDose sequence of DSCT and 2D-TTE before operation .Methods Thirty-three patients suspec-ted for aortic valve disease underwent MD-DSCT to observe coronary artery ,AVAD and LVEF .Of MD-DSCT ,the full tube current time window was applied only 10% RR interval ,the minimal tube current (4% ) was used in all other parts of the cardiac cycle .Images were reconstructed at 70% of RR interval and analyzed by using double oblique reconstruction . Results In all 33 patients ,MinDose technique successfully evaluated coronary artery .There was a strong correlation be-tween LVEF-MD-DSCT and LVEF-2D ( r =0 .96 ,P <0 .01) .There was also a strong correlation between AVAD-MD-DSCT and AVAD-2D ( r =0 .91 ,P <0 .01) .The CTDIvol ,DLP ,as well as ED of the experimental group differed sig-nificantly from those of the control group ( P < 0 .01) .Conclusion As an one-stop preoperative evaluation ,MinDose-DSCT can comprehensively reflect the coronary ,AVAD and LVEF of aortic stenosis patients .
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