NessAiver Moriel, Prince Jerry L
University of Maryland School of Medicine, Baltimore, MD 21201, USA.
Inf Process Med Imaging. 2003 Jul;18:573-85. doi: 10.1007/978-3-540-45087-0_48.
Magnetic resonance tagging is used to quantify and visualize myocardial motion. The lack of tag persistence, however, is often a problem in visualizing motion throughout the cardiac cycle, particularly in late diastole. Complementary spatial modulation of magnetization (CSPAMM) improves tag persistence, but requires complex signal subtraction, which is not available on all scanners. This paper analyzes the contrast to noise properties of a new method called magnitude image CSPAMM reconstruction (MICSR), which requires only magnitude images from the scanner and demonstrates improved contrast and tag persistence over CSPAMM. A novel "trinary checkerboard" display of myocardial motion, ideally matched to the contrast to noise properties of MICSR, is also presented.
磁共振标记用于量化和可视化心肌运动。然而，标记持久性的缺乏在整个心动周期的运动可视化中常常是个问题，尤其是在舒张末期。互补空间调制磁化（CSPAMM）改善了标记持久性，但需要复杂的信号减法，而并非所有扫描仪都具备此功能。本文分析了一种名为幅度图像CSPAMM重建（MICSR）的新方法的对比度与噪声特性，该方法仅需要来自扫描仪的幅度图像，并证明其在对比度和标记持久性方面优于CSPAMM。还提出了一种新颖的心肌运动“三进制棋盘”显示，它与MICSR的对比度与噪声特性完美匹配。
