Regional Myocardial Rotational Motion Analysis with Cine MRI, Cardiac MDCT, and Myocardial Tagging.

电影MRI跟踪左心室内膜或心外膜表面特征点轨迹分析局部心肌旋转运动与心肌标记图像跟踪左心室心肌网格标记交点轨迹分析局部心肌旋转运动基本一致。局部心肌旋转运动分析应采用每幅连续图像中左心室近似圆上的旋转角度或偏移长度。提出了心脏MDCT合适的造影剂注射速率和采集开始时间的估计方法。

Regional myocardial rotational motion analyzed with cine MRI by following up the track of characteristic points on the intimal or the epicardial surface of left ventricle was almost equivalent to that with myocardial tagging images by following up the track of the intersections of grid-like tags on the left ventricular myocardium. Angle of rotation or migration length on the approximated circle of the left ventricle in each successive images should be used for the regional myocardial rotational motion analysis. Some estimate methods of appropriate contrast injection rate and acquisition start timing forcardiac MDCT could be proposed.