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Abstract #2771

Efficient Non-Uniform Fourier Transform with embedded low-rank projection for fast model-based MRI reconstruction

Matteo Cencini1,2, Luca Peretti2,3, and Michela Tosetti1,2
1IRCCS Stella Maris, Pisa, Italy, 2Imago7 Foundation, Pisa, Italy, 3Università di Pisa, Pisa, Italy


Modern approaches to iterative imaging, such as model-based reconstruction, requires efficient implementations of Non-Uniform Fourier Transform to reach feasible reconstruction times. In addition, low-rank subspace projection is often used to reduce computational burden. While many implementations of NUFFT currently exists, they are not optimized for this kind of problems. Here, we propose a fast and memory-efficient NUFFT operator with embedded low-rank subspace projection. We demonstrate an order of magnitude of speed-up with comparable image quality compared to other high-level implementations.

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