Super-Resolved Two-Dimensional Spatiotemporally-Encoded Single-Scan MRI with Spiral Sampling

Jing Li¹, Lin Chen¹, Congbo Cai², Shuhui Cai¹, Zhong Chen¹

Last decades have witnessed a continuous growth of single-scan MRI, both in scientific research and clinical application. Spatiotemporally encoded (SPEN) MRI has an intrinsic immunity to field inhomogeneity. However, its phase encoding dimension is always sub-Nyquist sampling for ultrafast acquisition, which leads to aliasing artifacts. In this study, we propose a spiral sampling method for two-dimensional SPEN single-scan MRI. It can not only maintain the advantages of SPEN method, but also eliminate the aliasing artifacts due to undersampling. In combination with a super-resolved reconstruction based on the singular value decomposition, images with good quality can be obtained.