Abstract #2450

A Subspace Approach to Accelerated HASTE Acquisition for Fetal Brain MRI

Bo Zhao^1,2, Borjan Gagoski^2,3, Justin P. Haldar⁴, Elfar Adalsteinsson⁵, Ellen Grant^3,6, and Lawrence L. Wald^1,2

¹Athinoula A. Martinos Center for Biomedical Imaging, Chalestown, MA, United States, ²Harvard Medical School, Boston, MA, United States, ³Boston Children's Hospital, Boston, MA, United States, ⁴Electrical Engineering, University of Southern California, Los Angeles, CA, United States, ⁵Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States, ⁶Radiology, Harvard Medical School, Boston, MA, United States

HAlf-fourier Single-shot Turbo spin Echo (HASTE) acquisition is widely used in fetal MR imaging due to its T₂ contrast and motion robustness, but speed and T₂-blurring remain a problem for fully sampled acquisitions. In the work, we describe a new reconstruction approach based on low-rank and subspace modeling of local k-space neighborhood to accelerate HASTE acquisition. The proposed approach decreases the echo-train length with improved image quality and noise robustness compared to conventional reconstruction. It is compatible with the vendor-provided acquisition. The effectiveness and utility of the proposed approach is evaluated with both retrospectively and prospectively undersampled fetal imaging data.

This abstract and the presentation materials are available to members only; a login is required.

Join Here