基于欠采样投影重建的心肌壁标记
Myocardial wall tagging with undersampled projection reconstruction.
作者信息
Peters D C, Epstein F H, McVeigh E R
机构信息
Laboratory of Cardiac Energetics, National Institutes of Health, Bethesda, Maryland 20892-1061, USA.
出版信息
Magn Reson Med. 2001 Apr;45(4):562-7. doi: 10.1002/mrm.1076.
Abstract
Azimuthally undersampled projection reconstruction (PR) acquisition is investigated for use in myocardial wall tagging with MR using grid tags to provide increased temporal and spatial resolution. PR can provide the high-resolution images required for tagging with very few projections, at the expense of artifact. Insight is provided into the PR undersampling artifact, in the context of measuring myocardial motion with tags. For Fourier transform imaging, at least 112 phase-encodings must be collected to image tagging grids spaced 7 pixels apart. PR requires about 80 projections, a 1.4-fold reduction in scan time. Magn Reson Med 45:562-567, 2001. Published 2001 Wiley-Liss, Inc.
摘要
研究了方位欠采样投影重建（PR）采集技术在磁共振心肌壁标记中的应用，采用网格标记以提高时间和空间分辨率。PR能够以很少的投影次数提供标记所需的高分辨率图像，但代价是会产生伪影。在使用标记测量心肌运动的背景下，深入了解了PR欠采样伪影。对于傅里叶变换成像，必须采集至少112个相位编码才能对间距为7像素的标记网格进行成像。PR需要约80次投影，扫描时间减少了1.4倍。《磁共振医学》45:562 - 567，2001年。2001年由威利 - 利斯公司出版。
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