Interleaved Variable Density Sampling with ARC Parallel Imaging and Cartesian HYPR for Dynamic MR Angiography

INTRODUCTION For MR applications such as contrast-enhanced MR angiography (CE-MRA), it is desirable to simultaneously achieve high spatial and temporal resolutions; however fully-sampled Cartesian acquisition of large matrices is time consuming. View sharing combined with parallel imaging (PI) improves temporal resolution [1], as does incoherent under-sampling with compressed sensing (CS) [2] or Cartesian HYPR reconstruction [3,4]. Here, we describe how ARC parallel imaging [5] and HYPR can be used in combination to robustly reconstruct high temporal and spatial resolution images from highly under-sampled Cartesian data and show in vivo feasibility results for lower extremity CE-MRA.