Achieving Greater SPEED with Iterations between Object and K-space

Skipped Phase Encoding and Edge Deghosting (SPEED) can accelerate MRI with a single coil. Previously, SPEED sparsely sampled 3 interleaved datasets with skip size N and relative offsets along PE, and resolved aliasing ghosts by solving linear equations pixel-by-pixel. In this study, it is demonstrated that SPEED can be performed with only 1 dataset, similar to that used in GRAPPA except from only one receiver coil, achieving greater acceleration. The new algorithm imposes partial knowledge of the data in both reciprocal Fourier domains, and finds a global answer through straightforward iterations between Object and K-space (iOK).

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