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Abstract #4643

Retrospective Self-Navigated Cine Imaging Using the Unused Echo in Alternating TR SSFP

Hsu-Lei Lee1, Ajit Shankaranarayanan2, Krishna S. Nayak1,3

1Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, CA, USA; 2Global Applied Science Lab, GE Healthcare, Menlo Park, CA, USA; 3Keck School of Medicine, University of Southern California, Los Angeles, CA, USA

In alternating TR SSFP, a low-resolution readout of the target scan plane can be acquired during the often-unused short TR. We collect data from free-breathing continuous wideband SSFP sequence and demonstrate successful retrospective self-navigation using this signal. This method can avoid temporal blurring caused by respiration in a cardiac scan without using a separate navigator sequence, removes the dependence on patients’ ability to perform breath-holds, and allows for longer scan time to acquire higher spatial and temporal resolution images.