Correction for distortion of echo-planar images used to calculate the apparent diffusion coefficient
Correction for distortion of echo-planar images used to calculate the apparent diffusion coefficient
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DOI：
10.1002/mrm.1910360620
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发表时间：
1996-12-01
影响因子：
3.3
通讯作者：
Moore, JR
中科院分区：
文献类型：
--
作者：
Haselgrove, JC;Moore, JR
本文提出了一种校正扩散加权回波平面图像由于强扩散敏感梯度而产生的失真的算法。主要的失真可以被认为仅仅是尺度的变化，加上在相位编码方向上的剪切和线性平移。然后，可以通过使用这样的算法来校正它们，在该算法中，依次考虑图像在相位编码方向上的每一行，并且通过搜索仅找到一个参数(比例)。
An algorithm for correcting the distortions that occur in diffusion-weighted echo-planar images due to the strong diffusion-sensitizing gradients is presented. The dominant distortions may be considered to be only changes of scale coupled with a shear and linear translation in the phase-encoding direction. It is then possible to correct for them by using an algorithm in which each line of the image in the phase-encoding direction is considered in turn, with only one parameter (the scale) to be found by searching.