Fetal MRI utilizes Half-Fourier-acquisition-single-shot-turbo-spin-echo (HASTE) for rapid T2-weighted imaging to mitigate motion. However, T2-decay and partial fourier induce blurring, while refocusing trains extend total acquisition time due to specific absorption rate (SAR) constraints. Variable flip angles (VFA) with full Fourier acquisitions have been shown to improve image quality, maintain contrast, and accelerate acquisition through SAR reduction. We combine nonlinear reconstruction, VFA, and full Fourier undersampling to improve sharpness and reduce SAR while maintaining similar contrast to HASTE. Simulation and phantom experiments illustrate improved sharpness. Preliminary, in-vivo fetal results demonstrate improved sharpness and SAR with slight tradeoffs in contrast and SNR.
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