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Abstract #3968

Improved Pulmonary Artery Non-Contrast Balanced Steady State Free Precession MR Imaging using Golden Angle Radial versus Cartesian Sampling

Alexander Fyrdahl1,2, Roberto Vargas Paris3,4, Sven Nyrén1,4, Karen Holst1,2, Magnus Båth5,6, Martin Ugander1,2, Peter Lindholm3,4, and Andreas Sigfridsson1,2

1Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden, 2Department of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden, 3Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden, 4Department of Radiology, Karolinska University Hospital, Stockholm, Sweden, 5Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden, 6Department of Radiation Physics, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden

Free-breathing steady-state free precession MRI has shown promising results for pulmonary embolism diagnosis in preliminary studies. However, the acquisition is susceptible to artifacts from cardiorespiratory motion and flow. We propose a Golden Angle radial trajectory and show increased robustness to such artifacts in healthy volunteers, while providing added benefits such as sliding window reconstructions with higher temporal resolution than what is achievable by Cartesian sampling.

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