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To develop an isotropic high‐resolution stack‐of‐spirals UTE sequence for pulmonary imaging at 0.55 Tesla by leveraging a combination of robust respiratory‐binning, trajectory correction, and concomitant‐field corrections.

A stack‐of‐spirals golden‐angle UTE sequence was used to continuously acquire data for 15.5 minutes. The data was binned to a stable respiratory phase based on superoinferior readout self‐navigator signals. Corrections for trajectory errors and concomitant field artifacts, along with image reconstruction with conjugate gradient SENSE, were performed inline within the Gadgetron framework. Finally, data were retrospectively reconstructed to simulate scan times of 5, 8.5, and 12 minutes. Image quality was assessed using signal‐to‐noise, image sharpness, and qualitative reader scores. The technique was evaluated in healthy volunteers, patients with coronavirus disease …