Magnetic resonance imaging for assessment of myocardial function.
Magnetic resonance imaging for assessment of myocardial function.
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发表时间：
1991-10
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通讯作者：
N. Reichek
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作者：
N. Reichek
随着该领域的发展，心脏磁共振成像（MRI）可能会成为评价心肌功能的最终参考成像方法。该领域发展的第一阶段强调复制和改进用于分析整体心室泵功能、整体心室力学和局部心肌性能的常用方法。因此，存在用于评估心室舒张末期和收缩末期容积和射血分数的经验证的MRI方法。类似地，用于评价心肌平均壁应力的标准方法可以应用于评价作为心室性能的决定因素的后负荷。心肌局部功能可以用局部内膜运动或局部室壁增厚来评价。此外，最近开发的通过跟踪心动周期内组织中固定点处的运动来评估局部心肌运动的新方法吸引了心血管研究界的兴趣。这些方法，如径向条纹心肌标记和空间调制的磁化，已经提供了独特的和精辟的新信息，在正常和患病的心脏在实验模型和man.The最重要的限制心脏MRI评估心脏功能的节段心肌性能仍然是长的图像采集时间。随着真实的时间方法的出现和进一步发展，应该可以解决这个问题。
It is likely that, as the field progresses, cardiac magnetic resonance imaging (MRI) will become the definitive reference imaging method for evaluation of myocardial function. The first phase of development in the field has emphasized replication and improvement of commonly used methods for analysis of global ventricular pump function, global ventricular mechanics, and regional myocardial performance. Thus, validated MRI methods exist for assessment of ventricular end-diastolic and end-systolic volume and ejection fraction. Similarly, standard methods for evaluation of myocardial mean wall stress can be applied to evaluation of afterload as a determinant of ventricular performance. Regional function of myocardium can be evaluated using either regional endocardial motion or regional wall thickening. In addition, recent development of novel methods for assessment of local myocardial motion by tracking motion at fixed points in the tissue over the cardiac cycle has attracted interest from the cardiovascular research community. These methods, such as radial stripe myocardial tagging and spatial modulation of magnetization, have already provided unique and incisive new information on segmental myocardial performance in normal and diseased hearts in experimental models and in man. The most important limitation of cardiac MRI for assessment of cardiac function continues to be long image acquisition times. The advent of real time methods, with further development, should address this problem.