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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