Abstract #3214

Cardiac 4D phase-contrast MRI at 9.4 T using self-gated ultra-short echo time (UTE) imaging

Martin Krämer¹, Abdallah G Motaal², Karl-Heinz Herrmann¹, Bettina Löffler³, Jürgen R Reichenbach^1,4,5,6, Gustav J Strijkers^2,7, and Verena Hoerr³

¹Medical Physics Group, Institute of Diagnostic and Interventional Radiology, Jena University Hospital - Friedrich Schiller University Jena, Jena, Germany, ²Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, Netherlands, ³Institute of Medical Microbiology, Jena University Hospital - Friedrich Schiller University Jena, Jena, Germany, ⁴Michael Stifel Center for Data-driven and Simulation Science Jena, Friedrich Schiller University Jena, Jena, Germany, ⁵Abbe School of Photonics, Friedrich Schiller University Jena, Jena, Germany, ⁶Center of Medical Optics and Photonics, Friedrich Schiller University Jena, Jena, Germany, ⁷Biomedical Engineering and Physics, Academic Medical Center, Netherlands

Time resolved 4D phase contrast (PC) MRI in mice is challenging and often susceptible to artifacts due to long scan times, ECG-gating and the rapid blood flow and cardiac motion of small rodents. To overcome several of these technical challenges we implemented a retrospectively self-gated 4D-PC radial UTE acquisition scheme and assessed its performance in healthy mice by comparing the results with those obtained with an ECG-triggered 4D-PC fast low angle shot (FLASH) sequence.

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