Liheng Guo1, Elliot R. McVeigh1,
Robert J. Lederman2, J Andrew Derbyshire2, Daniel A.
Herzka1
1Biomedical Engineering, Johns Hopkins
University, Baltimore, MD, United States; 2Translational Medicine
Branch, National Heart, Lung, and Blood Institute, National Institute of
Health, Bethesda, MD, United States
A
dual-projection self-navigated SSFP sequence is implemented to acquire
navigation projections at two alternating angles during all TRs; it offers
projections of high spatiotemporal resolution at two different orientations,
thus providing a platform for 2D motion tracking and robust self-navigation,
which can replace the standard ECG gating and patient breath hold.
Preliminary post-processing of the projection data has shown that cardiac and
respiratory motions can be automatically extracted and separated, and that
free-breathing cardiac cine images can be automatically reconstructed to
comparable quality as standard breath-hold images.