Ricardo
(2023-02-28 22:09):
#paper doi:https://doi.org/10.1016/0730-725X(90)90056-8 Simulation of the influence of magnetic field inhomogeneity and distortion correction in MR imaging. 这篇论文比较老了，1990年发表的。作者在这篇论文中描述了一个用于模拟和校正由静态和梯度磁场中干扰MRI体素位置和信号编码的技术。数学原理其实不复杂，主要思想就是确定映射到目标图像的某个体素左右邻边在源图像上的位置，从而确定在源图像上体素的采样范围，根据线性插值的方法对采样范围内的体素进行加权。本来我想把这个模型用到我自己的工作中，但是思考了好几天发现这个过程貌似无法在模型中传递梯度，遂作罢。
Simulation of the influence of magnetic field inhomogeneity and distortion correction in MR imaging
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Abstract:
We describe a technique for simulation and correction of the effects of an arbitrary distribution of undesired components of the static and gradient magnetic fields. This technique is applicable to direct Fourier NMR imaging. The mathematical basis and details of this technique are fully described. Computer simulation demonstrates the effectiveness of this method.
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