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Abstract #3168

Self-navigated cardiac T1 mapping using an ultra short echo time (UTE) inversion recovery acquisition

Patrick Winter1, Thomas Kampf1, Fabian Tobias Gutjahr1, Cord Bastian Meyer1, Volker Herold1, Wolfgang Rudolf Bauer2, and Peter Michael Jakob1

1Experimental Physics 5, University of Wuerzburg, Wuerzburg, Germany, 2Medizinische Klinik und Poliklinik I des Universitaetsklinikums Wuerzburg, Wuerzburg, Germany

Radial trajectories enable self-navigated cardiac T1 measurements without the necessity of external ECG signals. However, the extracted cardiac synchronization signals and the reconstructed images can be suspectible to B0 inhomogeneities and flow. In order to improve the robustness of the self-navigated method a 2D - UTE inversion recovery sequence is introduced that minimizes the echo time to 0.57 ms and reduces the susceptibility to B0 inhomogeneities. Steady state cines and a T1 map were derived from the UTE measurement. Comparisons with a self-navigated gradient echo measurement indicate more reliable self-navigation signals and better image quality when using shorter echo times.

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