DENSE: Displacement encoding with stimulated echoes in cardiac functional MRI
DENSE: Displacement encoding with stimulated echoes in cardiac functional MRI
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DOI：
10.1006/jmre.1998.1676
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发表时间：
1999-03-01
影响因子：
2.2
通讯作者：
Wen, H
中科院分区：
文献类型：
--
作者：
Aletras, AH;Ding, SJ;Wen, H
开发了用于高分辨率心肌位移标测的刺激回波位移编码（DENSE）。像素相位由心肌位移调制，并且数据空间分辨率仅受像素大小的限制。使用0.94 x 1.9 mm标称平面内分辨率和2.3 mm/pi位移编码生成犬心脏收缩活动的2D位移矢量图。在收缩期105 ms内，测量游离左心室壁的径向应变为0.208。DENSE位移映射需要小的一阶梯度矩进行编码。DENSE幅度图像显示黑血对比度，这允许更好的心肌清晰度和减少的运动相关伪影。
Displacement encoding with stimulated echoes (DENSE) was developed for high-resolution myocardial displacement mapping. Pixel phase is modulated by myocardial displacement and data spatial resolution is limited only by pixel size. 2D displacement vector maps were generated for the systolic action in canines with 0.94 x 1.9 mm nominal in-plane resolution and 2.3 mm/pi displacement encoding. A radial strain of 0.208 was measured across the free left ventricular wall over 105 ms during systole. DENSE displacement maps require small first-order gradient moments for encoding. DENSE magnitude images exhibit black-blood contrast which allows for better myocardial definition and reduced motion related artifacts.