Abstract #4820

Accelerated HASTE-Based Fetal MRI with Low-Rank Modeling

Bo Zhao^1,2, Borjan Gagoski^2,3, Elfar Adalsteinsson ⁴, P. Ellen Grant^2,3, and Lawrence L. Wald^1,2

¹Martinos Center for Biomedical Imaging, Chalestown, MA, United States, ²Department of Radiology, Harvard Medical School, Boston, MA, United States, ³Boston Children's Hospital, Boston, MA, United States, ⁴Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States

HAlf-fourier Single-shot Turbo spin Echo (HASTE) sequence is one of the most common acquisitions in fetal MRI due to its T2 contrast and relative robustness to fetal motion. In this work, we present a low-rank model-based imaging method to accelerate HASTE acquisitions. The proposed method is fully compatible with the k-space sampling strategy implemented by vendor-provided pulse sequences, and provides improved image quality and/or noise robustness compared to the conventional half-Fourier and GRAPPA reconstruction, and compressive sensing reconstruction.

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