Numerous methods in the extensive literature on magnetic resonance imaging (MRI) reconstruction exploit temporal redundancy to accelerate cardiac cine. Some of them include motion compensation, which involves high computational costs and long runtimes. In this work, we proposed a method—elastic alignedSENSE (EAS)—for the direct reconstruction of a motion-free image plus a set of nonrigid deformations to reconstruct a 2D cardiac sequence. The feasibility of the proposed approach was tested in 2D Cartesian and golden radial multi-coil breath-hold cardiac cine acquisitions. The proposed approach was compared against parallel imaging compressed sense (sPICS) and group-wise motion corrected compressed sense (GWCS) reconstructions. EAS provides better results on objective measures with considerable less runtime when an acceleration factor is higher than 10×. Subjective assessment of an expert, however, invited proposing the combination of EAS and GWCS as a preferable alternative to GWCS or EAS in isolation.

中文翻译：

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用于动态MR重建的弹性对齐SENSE：心脏电影的概念验证

广泛的磁共振成像（MRI）重建文献中的许多方法都利用时间冗余来加速心脏电影的发展。其中一些包括运动补偿，这涉及较高的计算成本和较长的运行时间。在这项工作中，我们提出了一种方法-弹性对齐传感器（EAS）-用于直接重建无运动图像以及一组非刚性变形来重建2D心脏序列。在二维笛卡尔和金径向多线圈屏气心脏电影采集中测试了该方法的可行性。将该方法与并行成像压缩感知（sPICS）和逐组运动校正压缩感知（GWCS）重建进行了比较。当加速度因数高于10倍时，EAS可以在客观测量上提供更好的结果，而运行时间要短得多。但是，对专家的主观评估建议将EAS和GWCS的组合建议为孤立地替代GWCS或EAS的更可取的选择。