Godino-Moya Alejandro, Menchón-Lara Rosa-María, Martín-Fernández Marcos, Prieto Claudia, Alberola-López Carlos
Laboratorio de Procesado de Imagen, E.T.S.I. Telecomunicación, Universidad de Valladolid, Paseo Belén 15, 47011 Valladolid, Spain.
School of Biomedical Engineering and Imaging Sciences, King's College London, London SE1 7EH, UK.
Entropy (Basel). 2021 Apr 29;23(5):555. doi: 10.3390/e23050555.
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.
大量关于磁共振成像（MRI）重建的文献中的方法利用时间冗余来加速心脏电影成像。其中一些方法包括运动补偿，这涉及到高计算成本和长时间运行。在这项工作中，我们提出了一种方法——弹性对齐灵敏度编码（EAS），用于直接重建无运动图像以及一组非刚性变形以重建二维心脏序列。在二维笛卡尔和黄金径向多线圈屏气心脏电影采集实验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）和分组运动校正压缩感知（GWCS）重建方法进行了比较。当加速因子高于10倍时，EAS在客观测量方面能提供更好的结果，且运行时间显著缩短。然而，一位专家的主观评估建议将EAS和GWCS结合起来，作为单独使用GWCS或EAS的更优选择。
