McVeigh E R, Bolster B D
Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.
Magn Reson Med. 1998 Apr;39(4):657-61. doi: 10.1002/mrm.1910390421.
A novel tagging method is introduced that increases the spatial resolution of estimates of myocardial radial thickening. The separation of adjacent parallel tag planes is customized to match the expected motion of specific regions of the heart wall. In regions in which the tags increase their separation over systole (radial thickening), the tag planes are placed close together at end diastole. In regions in which the tags decrease their separation over systole (circumferential shortening), the tags are placed farther apart so they remain detectable at end systole. With variable separation tagging (VTAG), parallel plane tagging can be used to obtain higher-resolution estimates of radial thickening and circumferential shortening simultaneously.
本文介绍了一种新型标记方法，该方法可提高心肌径向增厚估计的空间分辨率。相邻平行标记平面的间距可根据心壁特定区域的预期运动进行定制。在标记在收缩期间距增大（径向增厚）的区域，标记平面在舒张末期紧密放置。在标记在收缩期间距减小（圆周缩短）的区域，标记放置得更远，以便在收缩末期仍可检测到。通过可变间距标记（VTAG），平行平面标记可用于同时获得更高分辨率的径向增厚和圆周缩短估计。
