Abstract #0619

Free-breathing non-contrast enhanced 3D radial respiratory-motion resolved pancreatic MRI at 3T using sparse iterative reconstruction

Jessica AM Bastiaansen¹, Jerome Yerly^1,2, Jean-Baptiste Ledoux², Ruud B van Heeswijk^1,2, Davide Piccini³, and Matthias Stuber^1,2

¹Department of Radiology, University hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland, ²Center for Biomedical Imaging, Lausanne, Switzerland, ³Advanced Clinical Imaging Technology, Siemens Healthcare, Lausanne, Switzerland

Pancreatic MRI is commonly performed during breath-held or navigator-gated acquisitions. The long breath-holds needed for high spatial resolution are not always feasible in patients and residual respiratory motion may still occur. Additionally, in some implementations, the navigator leads to a local signal void that may obscure parts of the anatomy of interest. Here we used a free-breathing self-navigated 3D radial gradient-recalled-echo (GRE) imaging sequence, and compared the 1D motion correction as performed on the scanner versus a motion-resolved 4D sparse iterative reconstruction. We show that non-contrast enhanced pancreatic MRI can be performed at 3T during free-breathing, while motion-resolved sparse reconstruction can efficiently minimize the adverse effects of respiratory motion.

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