Abstract #1408

Submillimeter morphologic lung MRI at 0.55T using balanced steady-state free precession with half-radial dual-echo readout (bSTAR)

Grzegorz Bauman^1,2, Nam G Lee³, Ye Tian⁴, Oliver Bieri^1,2, and Krishna S Nayak^3,4

¹Deparment of Radiology, Division of Radiological Physics, University of Basel Hospital, Basel, Switzerland, ²Department of Biomedical Engineering, University of Basel, Basel, Switzerland, ³Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, United States, ⁴Ming Hsieh Department of Electrical and Computer Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, United States

Synopsis

Keywords: Lung, Low-Field MRI, Morphology

In this work we explore the potential of free-breathing balanced steady-state free precession half-radial dual-echo imaging technique (bSTAR) for morphologic lung MRI in human subjects using high-performance 0.55T MR-scanner. The technique combines an efficient minimal-TR readout sampling with interleaved wobbling Archimedean spiral pole trajectories and retrospective respiratory self-gating. Lung imaging at 0.55T helped to markedly reduce off-resonance artifacts while providing an improved signal intensity and allowed for high-quality morphologic lung MRI at a submillimeter spatial resolution.

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