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Abstract #1083

Free-running 3D-CINE MRI of patients with congenital heart disease using inter-bin compensation of cardiac motion

Bastien Milani1, Christopher Roy1, Jean-Baptist Ledoux1, David C. Rotzinger1, Salim Si-mohamed1,2,3, Ambra Masi1, Jerome Yerly1,4, Tobias Rutz1, Milan Prsa1, Jurg Schwitter1, and Matthias Stuber1,4
1Lausanne University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland, 2INSA-Lyon, CNRS, Inserm, CREATIS, Université de Lyon,, Villeurbanne, France, 3Louis Pradel Hospital, Hospices Civils de Lyon, Bron, France, 4Center for Biomedical Imaging (CIBM), Lausanne, Switzerland

Synopsis

Keywords: Heart, Cardiovascular, ejection fractionWe present in this work a 3D-CINE whole-heart reconstruction that we developed for free-running 3D‑radial fully self-gated acquisitions. The reconstruction is compressed-sensing-based with temporal-total-variation (tTV) regularization, which is known to corrupt or compress motion and to blur moving structures. In order to solve these drawbacks, we regularize by an improved tTV equal to the one-norm of the sum of the motion-corrected-residuals between adjacent frames. While this strategy has already been applied for various trajectories, it has never been applied for 3D-radial in free-running. In this study, we demonstrate quantitatively and qualitatively that this strategy in fact improves image quality.

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