屏气电影法MRI评价左室功能初步研究

The Preliminary Study of Left Ventricular Function by Breath-hold Cine MR Imaging

目的 探讨MRI屏气电影成像技术评价左心室功能的价值。方法 应用屏气快速梯度回波和常规非屏气梯度回波技术对 18个正常志愿者进行心脏MRI检查 ,并用心功能分析软件计算左室容量及心肌质量等指标。结果 ①屏气电影法与常规非屏气电影法所得结果密切相关 ,左室舒张末期容量 (LVEDV)、左室收缩末期容量(LVESV)、左室射血分数 (LVEF)、左室心肌质量的相关系数分别为 0 .98、0 .96、0 .83和 0 .98。②两种方法所得的各指标均值比较 ,差异无显著性。结论 本研究结果表明MRI屏气电影法成像时间短 ,无运动伪影 ,是一种临床评价左心功能有价值的方法。

Objective To evaluate the left ventricular function in healthy volunteers with breath hold cine magnetic resonance imaging. Methods Eighteen healthy volunteers were scanned with breath hold cine MR imaging sequence and conventional cine MR imaging sequence respectively then left ventricular volumes and masses were analyzed with the software of cardiac evaluation. Results ①The values of LV end diastolic volume (LVEDV),LV end systolic volumes (LVESV),LV ejection fraction (LVEF),and LV mass with breath hold cine MR imaging technique were close correlated with those obtained by conventional methods(r=0.98,0.96,0.83,0.98,respectively).②There was no significant difference between the measurements of the two methods. Conclusion Breath hold cine MR imaging is useful method for evaluation the left ventricular function because of non ghosting artifacts and short imaging time.