Motion corrected compressed sensing for free-breathing dynamic cardiac MRI
Motion corrected compressed sensing for free-breathing dynamic cardiac MRI
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DOI：
10.1002/mrm.24463
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发表时间：
2013-08-01
影响因子：
3.3
通讯作者：
Prieto, Claudia
中科院分区：
文献类型：
--
作者：
Usman, Muhammad;Atkinson, David;Prieto, Claudia
压缩感知（CS）已被证明可以通过从高度欠采样数据中重建高质量的稀疏图像来加速MRI采集。磁共振扫描期间的运动可能导致k空间数据不一致，从而导致重建图像中的强烈运动伪影。为了使CS在这些应用中发挥作用，运动校正技术需要与欠采样重建相结合。最近，人们提出了关节运动校正和CS方法来部分校正运动的影响。然而，这些方法的主要限制是它们只能校正仿射变形。在这项工作中，我们提出了一种新的运动校正CS框架，用于自由呼吸动态心脏MRI，该框架将一般运动校正公式直接纳入CS重建。该框架可以校正CS重建心脏图像中的任意仿射或非刚性运动，同时受益于高度加速的MR采集。该方法的应用在模拟和体内数据的2D呼吸自门控自由呼吸心脏CINE MRI，使用黄金角径向采集。结果表明，这种方法可以重建呼吸运动校正的心脏CINE图像，其质量与屏息图像相似。中华医学杂志，2013,31(4):564 - 564。(c) 2012 Wiley期刊有限公司
Compressed sensing (CS) has been demonstrated to accelerate MRI acquisitions by reconstructing sparse images of good quality from highly undersampled data. Motion during MR scans can cause inconsistencies in k-space data, resulting in strong motion artifacts in the reconstructed images. For CS to be useful in these applications, motion correction techniques need to be combined with the undersampled reconstruction. Recently, joint motion correction and CS approaches have been proposed to partially correct for effects of motion. However, the main limitation of these approaches is that they can only correct for affine deformations. In this work, we propose a novel motion corrected CS framework for free-breathing dynamic cardiac MRI that incorporates a general motion correction formulation directly into the CS reconstruction. This framework can correct for arbitrary affine or nonrigid motion in the CS reconstructed cardiac images, while simultaneously benefiting from highly accelerated MR acquisition. The application of this approach is demonstrated both in simulations and in vivo data for 2D respiratory self-gated free-breathing cardiac CINE MRI, using a golden angle radial acquisition. Results show that this approach allows for the reconstruction of respiratory motion corrected cardiac CINE images with similar quality to breath-held acquisitions. Magn Reson Med 70:504-516, 2013. (c) 2012 Wiley Periodicals, Inc.