心率对双源CT冠状动脉成像质量的影响

目的研究心率对双源CT冠状动脉造影图像质量的影响。方法应用回顾性研究分析不同心率状态下（分为低、中、高心率组）双源CT图像清晰度，将图像质量判读分为0～4级，采用Kruskal—WallisH检验比较各组间分值差异有无统计学意义，同时应用Spearman秩相关检验对图像质量与心率进行相关性分析。结果3组间Kruskal—WallisH检验结果差异无统计学意义（H值为0．58，P：0．75〉O．05）。秩相关检验r=0．28，P〉0．05。结论各组成像质量与心率无显著相关性，双源CT冠状动脉造影有较高的临床诊断价值。

Influence of Coronary Angiography on the Diagnostic Accuracy of Dual-Source Computed Tomography Coronary Angiography

Objective To explore the correlation of heart rate and image quality in coronary angiography with dual-source CT. Method Image quality was compared in different heart rates with low heart rate （〈 75 bpm）, medium heart rate（75-85 bpm） and high heart rate groups （〉85 bpm）. Image quality was divided by four classes from excellent （A） to non-diagnostic （D）, and spearman rank correlation analysis was performed to compare image quality and heart rate. Results There was no significant difference in image quality of three groups （H= 0.58,P= 0.75〉 0. 05）. In spearman rank correlation analysis, there was no significant differences with heart rate and coronary artery image quality（r= 0.28, P〉0.05）. Conclusion Dual-source CT offers high quality image in a wide range of heart rates. Image quality is not influenced by heart rate when coronary angiography with DSCT.