Keywords: Data Acquisition, Acquisition Methods
Motivation: Designing hardware efficient trajectories is important for improving sampling efficiency, which can improve spatial encoding, mitigate off-resonance artifacts, and shorten echo times for diffusion sequences.
Goal(s): To develop and characterize an imaging trajectory that fully utilizes the available gradient hardware.
Approach: We propose using trirals, a triangular version of spiral trajectories, to fully utilize the available slew-rate on modern scanners.
Results: Trirals show a theoretical decrease in readout time by 10%, while obtaining similar spatial encoding capabilities. We also demonstrate the use of variable density and mutli-shot trirals.
Impact: Decreasing the readout time using trirals is important for time sensitive artifacts, such as field imperfections, and sequence TR/TE dependent signal changes.
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