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Abstract #4497

Self-Gated Pulmonary Embolism Imaging with Multi-Slice Golden-Angle Radial bSSFP

Alexander Fyrdahl1,2, Roberto Vargas-Paris3,4, Koshiar Medson3,5, Sven Nyrén1,5, Martin Ugander1,2, Peter Lindholm3,5, 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 Thoracic Radiology, Karolinska University Hospital, Stockholm, Sweden

Free-breathing, non-contrast bSSFP MRI has shown great potential for imaging of pulmonary embolisms in patients with contraindication for contrast-enhanced computed tomography angiography. While the free-breathing approach is convenient, it limits the possibility for multiplanar reformatting which otherwise could aid in visualizing the pulmonary vasculature. In this work, we propose a methodology for deriving a motion signal from the free-breathing data and we incorporate this signal in the reconstruction pipeline to obtain a slice-aligned image stack from which multiplanar reformatting can be performed.

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