MR Gravimetry (MRG) of the Lung

Computer tomograms show vertical gradients in parenchyma density due to gravity, relating to the mechanical properties of the lung. Gravitational effects on the lung were also assessed by a few occasional MRI studies, but are generally limited by the overall poor SNR of contemporary methods. Only recently a new ultra-fast balanced SSFP imaging technique was introduced, offering exceptional SNR and CNR for in vivo lung imaging at 1.5 T. This makes the investigation of gravity-related effects in the lung tissue feasible. Here, we develop the corresponding framework for such MRI investigations, termed MR Gravimetry of the lung.

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