Improved Spatial & Temporal Resolution using Parallel Imaging & SOS Trajectory for HYPR Reconstruction

Lauren Ashley Keith¹, Kang Wang¹, James H. Holmes², Philip Beatty², Frank Korosec³

Synopsis: The stack-of-stars (SOS) trajectory has been previously used with HYPR reconstruction for time-resolved contrast enhanced angiography, particularly of the peripheral vasculature. One limitation of this trajectory has been the through plane resolution; in order to fulfill temporal resolution requirements, slice thickness has typically been larger than the in-plane resolution. In this work, we apply a data-driven, coil-by-coil parallel imaging technique to our SOS-HYPR protocol. This allows an increase in both through-plane spatial resolution and temporal resolution compared to previously presented results without parallel imaging.