Limits of Spatial Resolution of Phase Encoding Dimensions in MRI of Metals
Limits of Spatial Resolution of Phase Encoding Dimensions in MRI of Metals
复制标题
金属MRI中相位编码维度空间分辨率的限制
DOI：
10.1021/acs.jpclett.8b03758
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Chekmenev, Eduard Y.
中科院分区：
文献类型：
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作者：
Chandra Shekar, S.;Hallinan, Daniel T.;Taylor, Deanne M.;Chekmenev, Eduard Y.
一种常见的误解是，在多维MRI实验的相位编码的间接维度上没有加宽(模糊)，尽管著名的分析跟踪图像特征的分辨率沿该维度的截断数据(有限分辨率)的损失。这里我们发展了一个经验法则，加宽函数的半高宽(HWHM)是δ≈0.6HWHM，其中Δ是分辨率或沿该维度的像素大小。我们提供了实验证据来证实这一原理。从二维核磁共振的恒定时间间接维与二维核磁共振的相位编码维进行了比较。
A common misperception is that there is no broadening (blurring) along a phase-encoded indirect dimension of a multidimensional MRI experiment, despite the celebrated analyses tracing the loss of resolution of image features to truncated data (finite resolution) along that dimension. Here we develop a rule of thumb that the half-width at halfmaximum (HWHM) of the broadening function is δ≈ 0.6 Δ, where Δ is the resolution or the pixel size along that dimension. We provide experimental evidence corroborating this principle. A parallel is drawn from 2D NMR with a constant time indirect dimension to that of the phase encoding dimension in 2D MRI.