Variable field of view for spatial resolution improvement in continuously moving table magnetic resonance imaging.
Variable field of view for spatial resolution improvement in continuously moving table magnetic resonance imaging.
复制标题
可变视场可提高连续移动工作台磁共振成像的空间分辨率。
DOI：
10.1002/mrm.20509
复制
发表时间：
2005
影响因子：
3.3
通讯作者：
Riederer,StephenJ
中科院分区：
文献类型：
--
作者：
Hu,HouchunH;Madhuranthakam,AnanthJ;Kruger,DavidG;Glockner,JamesF;Riederer,StephenJ
An approach is described in which the field of view (FOV) along theY(right/left) phase encoding direction can be dynamically altered during a continuously moving table (CMT) coronal acquisition for extended FOV MRI. We hypothesize that with this method, regions of the anatomy exhibiting significantly different lateral widths can be imaged with a matching local FOVY, thereby improving local lateral spatial resolution.k‐space raw data from the variable‐FOV CMT acquisition do not allow simple Fourier reconstruction due to the presence of a mixture of phase encodes sampled at different ΔkYintervals. In this work, we employ spline interpolation to reregister the mixed data set onto a uniformly sampledk‐space grid. Using this interpolation scheme, we present phantom and peripheral contrast‐enhanced MR angiography results demonstrating an approximate 45% improvement in local lateral spatial resolution for continuously moving table acquisitions. Magn Reson Med 54:146–151, 2005. © 2005 Wiley‐Liss, Inc.
