Preliminary clinical application of total free-breathing cardiac MR examination

全自由呼吸心脏MR检查:初步临床应用

Objective To observe the clinical application value of total free-breathing cardiac MR(CMR)examination preliminarily.Methods Two patients who underwent CMR scanning under free-breathing state,including cine,motion correction T1 and T2 mapping,blood flow imaging,and late gadolinium enhancement scanning were retrospectively enrolled,and the qualities of the above images were evaluated and compared with that of conventional CMR images under breath-holding state.Results No significant difference of imaging quality was found between total free-breathing and conventional breath-holding CMR.The differences of left ventricular ejection fraction,cardiac output,left ventricular end-diastolic volume index and left ventricular mass measured based on CMR images under different breath conditions were limited.Conclusion Total free-breathing CMR was feasible in clinical practice,which could provide"one-stop"evaluation of cardiac structure,function and myocardial histological characteristics,hence having promising clinical prospects.

目的初步观察全自由呼吸心脏MR(CMR)检查的临床应用价值。方法回顾性选取2例于自由呼吸状态下接受CMR扫描,包括电影成像、运动校正T1及T2 mapping、血流成像和钆对比剂延迟增强扫描患者,评估其CMR图像质量,并与常规屏气状态下CMR图像进行对比。结果全自由呼吸与常规屏气状态下CMR图像质量差异不显著,且基于二者所测左心室射血分数、心输出量、左心室舒张末容积指数和左心室心肌质量等差值均较小。结论全自由呼吸CMR扫描可用于临床“一站式”评估心脏结构、功能及心肌组织学特征,应用前景广阔。