Navigator-Free Self-Gated Dynamic Cine Imaging Using 2D Cartesian Golden Step Phase Encoding

Liheng Guo¹, Ozan Sayin¹, J. Andrew Derbyshire², Daniel A. Herzka¹

We propose a 2D self-gated dynamic imaging strategy that detects motion using near-center Cartesian phase encodes instead of dedicated navigator echoes, featuring 1) no motion-detection overhead to imaging data acquisition, 2) high motion-sampling rate and cine reconstruction frame rate both retrospectively and independently adjustable, and 3) minimal required knowledge about the motion prior to scan (no motion-dependent parameter to calculate prior to scan). Automatic retrospective reconstruction of self-gated cines have been successful for both breath-hold cardiac and musculoskeletal (knee) studies, showing the motion-detection capability and flexibility of our propose technique.