Keywords: New Trajectories & Spatial Encoding Methods, Sparse & Low-Rank Models, Sparse sampling
Motivation: With the increasing demand for high-resolution and short MRI exams, especially at high and ultra-high field, there is a need for fast acquisition techniques.
Goal(s): To improve highly accelerated compressed-sensing by introducing a novel sampling named Alternating Basis Readout Imaging with COmpressed$$$\,$$$sensing with Three-dImensioNal Encoding (ABRICOTINE).
Approach: ABRICOTINE incorporates sparse phase-encoding in three orthogonal directions, achieving true three-dimensional undersampling of the Fourier domain. This differs from conventional compressed$$$\,$$$sensing, which only undersamples within two phase-encoding dimensions.
Results: We demonstrate significant enhancements in brain image quality through both simulations and true ABRICOTINE-accelerated acquisitions. It surpasses conventional compressed$$$\,$$$sensing methods and enables 0.5mm isotropic imaging in 4min.
Impact: ABRICOTINE allows for a substantial improvement in compressed-sensing acceleration compared to traditional sparse sampling techniques, especially when high acceleration factors are required. It thus shows great potential for further accelerating high resolution MRI acquisitions.
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