呼吸运动适应参数对磁共振冠状动脉成像质量的影响

Influence of respiratory move adaptation on the quality of magnetic resonance coronary angiography

目的探讨在全心对比增强磁共振冠状动脉成像中,呼吸运动适应(resp move.adap)参数的使用与否对呼吸平稳患者成像质量的影响。方法应用3.0T磁共振扫描仪对34名志愿者进行全心对比增强检查,其中26名志愿者成功完成检查。应用序贯抽样方案分为A和B两组,每组13名志愿者。A组使用参数resp move.adap,B组不使用该参数。应用两样本U检验及χ2检验对比分析两种方法的成像质量及段落显示率。结果两组图像质量比较差异有统计学意义(U=46.00,P=0.034),右冠状动脉节段显示率差异有统计学意义(χ2=6.385,P=0.012),前降支节段显示率差异有统计学意义(χ2=5.764,P=0.016),回旋支节段显示率差异无统计学意义(χ2=2.229,P=0.135)。组间性别及年龄差异无统计学意义。结论在对比增强全心磁共振冠状动脉成像中,对于呼吸平稳的患者,不使用resp move.adap参数成像的效果优于使用该参数。

Objective To explore the influence of respiratory move adaptation （resp move.adap） on the contrast-enhanced whole heart coronary magnetic resonance angiography （CMRA）. Methods Thirty-four consecutive volunteers were enrolled in this study. Twenty-six of them successfully finished all examinations with 3.0T MR coronary angiography. They were divided into A （n=13） and B （n=13） group by sequential sampling method （group A with parameter of resp move.adap, group B without this parameter）. The statistic analysis of imaging quality and display of coronary artery segments were performed with Mann-Whitney U-test and Chi-square test. Results Image qualities of both groups had significant differences （U=46.00, P=0.034）. There were differences on the display of right coronary artery segments between two groups （χ2=6.385, P=0.012）, as well as the left anterior descending artery segments （χ2=5.764, P=0.016）. Display of the circumflex segments between groups had no significant difference （χ2=2.229, P=0.135）, none of sex and age. Conclusion The image quality without resp move. adap parameter is better than that with the parameter during MR coronary angiography when the breath remains stable.