FLORET (Fermat looped, orthogonally encoded trajectories) is an efficient center-out 3D spiral trajectory, and it supports ultra-short echo times. In this work, a new trajectory ordering scheme and FLORET balanced steady-state free precession (FLORET-bSSFP) were developed at 1.5T with inline reconstruction. Simulations, phantom, and human lung imaging were performed to compare the performance of the proposed trajectory ordering with standard ordering. The proposed trajectory ordering scheme minimized artifacts caused by the changing gradient moments while improving temporal stability and motion robustness. High-quality free-breathing lung images were obtained using FLORET-bSFFP and spoiled gradient echo-based UTE FLORET.
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