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Sampling patterns on a 144 × 48 grid used for in vivo acquisition. Here, the horizontal axis represents time (frames), and the vertical axis represents the phase encoding direction. Each sample on the 2D grid represents a readout line along the third orthogonal direction (not shown). a: Uniform interleaved sampling (UIS). b: Variable density random sampling (VRS). c: VISTA distribution. Only six (out of eleven) acceleration rates are displayed.
