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Abstract #3305

Accelerated 3D-UTE-AFI B1 mapping to correct VFA-based T1 estimations in short T2* tissues

Marta Brigid Maggioni1, Martin Krämer1,2, and Jürgen R. Reichenbach1,2,3,4,5
1Medical Physics Group, Institute of Diagnostic and Interventional Radiology, Jena University Hospital - Friedrich Schiller University, Jena, Germany, 2Institute of Diagnostic and Interventional Radiology, Jena University Hospital - Friedrich Schiller University, Jena, Germany, 3Michael Stifel Center for Data-driven and Simulation Science Jena, Friedrich Schiller University, Jena, Germany, 4Abbe School of Photonics, Friedrich Schiller University, Jena, Germany, 5Center of Medical Optics and Photonics, Friedrich Schiller University, Jena, Germany

B1 mapping is a considerable challenge for T1 quantification, and it is especially difficult for short T2* species because only ultrashort echo-time (UTE) imaging sequences are able to retrieve signal in such tissues. Recently a method called Actual Flip Angle Imaging (AFI) has shown promising results because of its potential to be combined with UTE acquisition. However the AFI method is characterized by long acquisition times. In this work we propose to use undersampling to reduce the acquisition times of AFI-based B1 mapping.

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