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Abstract #4820

Accelerated HASTE-Based Fetal MRI with Low-Rank Modeling

Bo Zhao1,2, Borjan Gagoski2,3, Elfar Adalsteinsson 4, P. Ellen Grant2,3, and Lawrence L. Wald1,2

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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