PHASE UNWRAPPING IN THE 3-POINT DIXON METHOD FOR FAT-SUPPRESSION MR-IMAGING
PHASE UNWRAPPING IN THE 3-POINT DIXON METHOD FOR FAT-SUPPRESSION MR-IMAGING
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DOI：
10.1148/radiology.192.2.8029431
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发表时间：
1994-08-01
期刊：
影响因子：
19.7
通讯作者：
QUINN, SF
中科院分区：
文献类型：
--
作者：
SZUMOWSKI, J;COSHOW, WR;QUINN, SF
目的：提出一种在磁共振 (MR) 成像三点 Dixon (3PD) 方法中执行脂肪和水信号分离相位展开的算法。材料和方法：该算法基于二维区域生长方法，跟踪 3PD 图像中的相位演化，并在检测到 2 pi 跳跃时展开相位。展开的相位数据连续用于计算每个像素的脂肪和水信号分量。该方法在八名志愿者中进行了测试。结果：该算法创建四个输出图像：标准自旋回波图像、脂肪抑制图像、水抑制图像和相位图图像。该方法校正了磁场不均匀性的影响，并提供优于标准方法可实现的空间均匀脂肪信号抑制。结论：这种 3PD 数据重建方法似乎有望在临床环境中常规应用脂肪抑制 MR 成像。
PURPOSE: To present an algorithm for performing phase unwrapping for fat and water signal separation in the three-point Dixon (3PD) method of magnetic resonance (MR) imaging.MATERIALS AND METHODS: The algorithm is based on a two-dimensional region-growing approach, which tracks phase evolution in 3PD images and unwraps the phase when a 2 pi jump is detected. The unwrapped phase data are consecutively used to calculate fat and water signal components on a per-pixel basis. The method was tested in eight volunteers.RESULTS: The algorithm creates four output images: standard spin-echo, fat suppression, water suppression, and phase map images. This method corrects for the effects of magnetic field inhomogeneities and provides spatially uniform fat signal suppression superior to that achievable with the standard method.CONCLUSION: This method of 3PD data reconstruction appears to be promising for routine application of fat suppression MR imaging in a clinical setting.