Dipartimento di Radiologia e Cardiologia, Azienda Ospedaliero-Universitaria, Parma, Italy.
Radiol Med. 2010 Aug;115(5):702-13. doi: 10.1007/s11547-010-0525-0. Epub 2010 Feb 22.
The authors sought to compare magnetic resonance imaging (MRI) and computed tomography (CT) for assessing left ventricular (LV) function parameters in a large patient population.
The study was conducted on 181 patients who underwent cardiac MRI and cardiac CT for various indications. For MRI, we used two-dimensional cine balanced steady-state free precession (b-SSFP) sequences, and for CT we used multiphase short-axis reconstructions. Volume data sets were evaluated with dedicated software. Results were compared with a paired, two-tailed Student's t test, Pearson's correlation (r), and Bland-Altman analysis.
A high level of concordance was observed between cardiac MRI and CT. Ejection fraction (EF) was 53+/-14% for MRI vs. 53%+/-15% for CT. There was good correlation for EF (r=0.71; p>0.05) and end-systolic volume (r=0.74; p>0.05). End-diastolic volume (74+/-23 ml at MRI vs. 71+/-19 ml at CT; r=0.58; p<0.05) and myocardial mass (63+/-20 g at MRI and 56+/-18 g at CT; r=0.89; p<0.01) showed statistically significant differences, although the discrepancy had no clinical impact.
MRI and CT show a good level of agreement in assessing LV function parameters, and both can be used interchangeably in clinical practice.
作者旨在比较磁共振成像（MRI）和计算机断层扫描（CT）在评估大量患者左心室（LV）功能参数方面的作用。
本研究纳入了 181 例因不同适应证而行心脏 MRI 和心脏 CT 的患者。心脏 MRI 使用二维电影平衡稳态自由进动（b-SSFP）序列，心脏 CT 使用多期短轴重建。使用专用软件评估容积数据集。结果采用配对双尾学生 t 检验、Pearson 相关（r）和 Bland-Altman 分析进行比较。
心脏 MRI 和 CT 之间观察到高度一致性。MRI 的射血分数（EF）为 53+/-14%，CT 为 53%+/-15%。EF（r=0.71；p>0.05）和收缩末期容积（r=0.74；p>0.05）相关性良好。舒张末期容积（MRI 为 74+/-23 ml，CT 为 71+/-19 ml；r=0.58；p<0.05）和心肌质量（MRI 为 63+/-20 g，CT 为 56+/-18 g；r=0.89；p<0.01）存在统计学差异，但差异无临床意义。
MRI 和 CT 在评估 LV 功能参数方面具有良好的一致性，在临床实践中可互换使用。
