屏气电影法MRI评价左心室功能的价值

目的：探讨MR屏气电影成像技术评价左室功能的价值。方法：应用屏气电影法MRI对18例健康成年志愿者和36例心脏病患者进行检查，并对左室容量和心肌质量进行测量，将屏气电影法MRI的结果与传统电影法MRI及超声心动图进行比较。结果：（1）屏气电影法与传统电影法MRI及超声心动图所得舒张末期容量（EDV）、收缩末期容量（ESV）、射血分数（EF）相关性良好，相关系数为0．52－0．96，3种方法所测各指标的均值间比较差异无显著性意义（P＞0．05）。（2）3种方法所测舒张末期心肌质量（EDM），收缩末期心肌质量（ESM）相关系数较前3个指标低，且MRI与超声心动图所测ESM的均值差异有显著性意义（P＜0．05），MRI与超声心动图ESM测量的一致性欠佳。结论：屏气电影法MRI与传统电影法MRI、超声心动图比较，各心功能指标测量准确，相关性好，且成像时间短，无呼吸运动伪影，是1种临床实用价值很高的技术。

Evaluation of left ventricular function with breath-hold MR imaging

Objective To investigate the value of breath hold cine MR imaging in the evaluation of left ventricular function Methods Eighteen healthy volunteers and 36 patients with cardiac diseases were studied with breath hold cine MR imaging, then left ventricular volumes and masses were measured, and the measurements were compared with those of conventional cine MR imaging and echocardiography Results (1)The measurements of end diastolic volume(EDV),end systolic volume (ESV),and ejection fraction (EF) with breath hold cine MR imaging technique were closely correlated with those obtained by conventional cine MR imaging and echocardiography There was no statistically significant difference among the measurements of the three methods ( P >0.05) The correlation coefficients were 0 52-0 96 (2) The correlation coefficients of left ventricular mass(EDM and ESM) among three methods were lower than those of left ventricular volume ,and there was statistically significant difference in ESM between MRI and echocardiography( P <0.05) Conclusion Breath hold cine MR imaging is an useful method for evaluating the left ventricular function because of non ghosting artifacts and short imaging time