Golden Step Phase Encoding: Simultaneous Real-Time & ECG Gated-Cine Parallel MRI with Retrospective Selection of Temporal Resolution, Acceleration Rate & Acquisition Duration

J. Andrew Derbyshire¹, Haris Saybasili¹, Liheng Guo², Ozan Sayin², Peter Kellman¹, Robert J. Lederman¹, Daniel A. Herzka²

Golden Step phase encoding provides close-to-uniform sampling of k-space for any number of consecutive TRs. We demonstrate a MR imaging strategy that allows simultaneous real-time and ECG-gated Cine imaging from a single acquisition. In particular, multiple sets of images with differing temporal resolutions may be reconstructed with arbitrary acceleration rates at arbitrary temporal positions from a single Cartesian acquisition. Furthermore, the gated Cine reconstructions can be performed from acquisitions comprising an arbitrary number of heartbeats, permitting the reconstruction of images even from incomplete breath-holds.