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Abstract #1489

Retrospective Self-Gated 3D UTE Lung Imaging

Kathrin Hemberger1, Stefan Weick2, Felix A. Breuer1, Peter M. Jakob1, 2, Daniel Haddad3

1MRB Research Center for Magnetic-Resonance-Bavaria, Wuerzburg, Germany; 2Departement of Experimental Physics 5, Institute of Physics, Wuerzburg, Germany; 3MRB Research Center, Wuerzburg, Germany

In this work retrospectively self-gated 3D UTE imaging of the human lung is presented. In standard 3D UTE the radial trajectories are acquired linearly following a spiral path along the surface of a sphere. This sampling strategy potentially leads to non-uniform coverage of k-space after retrospective gating leading to undersampling artifacts in the final images and therefore is restricted to prospective gating methods. strategies. In order to allow for flexible retrospective gating we implemented a quasi random (QR) based radial sampling scheme. This allows for resonably uniform k-space coverage after retrospective gating to arbitrary breathing states.