4D flow MRI is time consuming, since it requires the acquisition of time-resolved images with three-directional velocity encoding. Undersampled reconstruction techniques have been proposed to accelerate 4D flow carotid imaging, however scan time remains lengthily for high-resolution acquisitions. In this work, we propose to further accelerate 4D flow carotid MR imaging by exploiting patch-based similarities in local, non-local and multi-contrast dimensions with high-dimensional patch-based undersampled reconstruction (HD-PROST). The results show similar velocities for both k-t SENSE and the proposed HD-PROST, however higher precision was obtained with HD-PROST.
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