Movement correction of the kidney in dynamic MRI scans using FFT phase difference movement detection
Movement correction of the kidney in dynamic MRI scans using FFT phase difference movement detection
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DOI：
10.1002/jmri.10020
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发表时间：
2001-12-01
影响因子：
4.4
通讯作者：
Geerlings, M
中科院分区：
文献类型：
--
作者：
Giele, ELW;de Priester, JA;Geerlings, M
为了测量皮质和髓质 MR 肾图，在使用动态 MRI 采集的图像中将感兴趣区域 (ROI) 放置在肾脏上。由于天然肾脏随着呼吸而移动，而屏气技术不可行，因此需要进行运动矫正。在这篇文章中，我们比较了三种校正方法，分别基于图像匹配、相位差运动检测（PDMD）和互相关。基于 PDMD 的方法显示出最佳性能，并且能够在我们的测试系列中确定肾脏运动，其中 68% 的扫描没有明显偏差，如果一像素偏差被认为是可以接受的，则在 88% 的扫描中能够确定肾脏运动。 (C) 2001 Wiley-Liss, Inc.
To measure cortical and medullary MR renograms, regions of interest (ROIs) are placed on the kidney in images acquired using dynamic MRI. Since native kidneys move with breathing, and breath-holding techniques are not feasible, movement correction is necessary. In this contribution we compare three correction methods, based on image matching, phase difference movement detection (PDMD), and cross-correlation, respectively. The PDMD-based method showed the best performance and was able to determine kidney movement in our test series in 68% of the scans with no visible deviation, and in 88% of the scans if a one-pixel deviation is considered acceptable. (C) 2001 Wiley-Liss, Inc.