Sechtem U, Pflugfelder P, Theissen P, Schicha H, Hilger H H, Higgins C B
Medizinische Klinik III, Universität Köln.
Z Kardiol. 1988 May;77(5):310-7.
Cardiac function can be assessed using conventional spin-echo magnetic resonance imaging. However, long imaging times and poor temporal resolution have limited the clinical applicability of this technique. A new dynamic magnetic resonance pulse sequence avoids these shortcomings using lower flip angles, shorter repetition and echo times and gradient refocused echoes. The entire heart can thus be imaged with a temporal resolution of 60 ms within 20 min. Display of 15 images of the cardiac cycle in a movie loop allows excellent visual assessment of cardiac motion and intracardiac blood flow. Applications of this new technique include blood flow measurements, visualization of regurgitant or shunt blood flow in patients with valvular regurgitation or ventricular septal defect, assessment of regional wall thickening in patients with myocardial disease, and three-dimensional determination of ventricular and atrial volumes.
可使用传统自旋回波磁共振成像来评估心脏功能。然而，较长的成像时间和较差的时间分辨率限制了该技术的临床应用。一种新的动态磁共振脉冲序列通过使用较低的翻转角、较短的重复时间和回波时间以及梯度重聚回波避免了这些缺点。因此，整个心脏能够在20分钟内以60毫秒的时间分辨率成像。以电影循环形式显示心动周期的15张图像能够对心脏运动和心腔内血流进行出色的视觉评估。这项新技术的应用包括血流测量、瓣膜反流或室间隔缺损患者反流或分流血流的可视化、心肌病患者局部心肌增厚的评估以及心室和心房容积的三维测定。
