Through-time non-Cartesian GRAPPA can be used to enable real-time imaging for evaluation of left-ventricular function. However, it requires arrays with many receiver coils for the parallel imaging reconstruction and gradient systems capable of playing out the specified non-Cartesian trajectories. In this work, we explore the use of non-Cartesian GRAPPA for real-time cardiac imaging on a 0.55T system with lower performance gradients, reduced receiver coils compared to conventional MRI systems.
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