About the performance of multi-dimensional radial self-navigation incorporating compressed sensing for free-breathing coronary MRI
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چکیده
About the performance of multi-dimensional radial self-navigation incorporating compressed sensing for free-breathing coronary MRI Gabriele Bonanno, Gilles Puy, Yves Wiaux, Ruud B. van Heeswijk, and Matthias Stuber Department of Radiology, University Hospital (CHUV) and University of Lausanne, Lausanne, Vaud, Switzerland, Center for Biomedical Imaging (CIBM), Lausanne, Vaud, Switzerland, Institute of Electrical Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Vaud, Switzerland, Institute of the Physics and Biological Systems, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Vaud, Switzerland, Institute of Bioengineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Vaud, Switzerland
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Self-Navigation with Compressed Sensing for 2D Translational Motion Correction in Free-Breathing Coronary MRI: A Feasibility Study
PURPOSE Respiratory motion correction remains a challenge in coronary magnetic resonance imaging (MRI) and current techniques, such as navigator gating, suffer from sub-optimal scan efficiency and ease-of-use. To overcome these limitations, an image-based self-navigation technique is proposed that uses "sub-images" and compressed sensing (CS) to obtain translational motion correction in 2D. The...
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Background Evaluation of myocardial function with MRI is challenging on patients with impaired breath-hold (BH) capabilities or arrhythmias due to the difficulty of respiratory motion suspension and synchronization of cardiac cycles. Compressed sensing (CS) enables free breathing (FB) real-time cine imaging with improved spatiotemporal resolution, but conventional temporal sparsifying transform...
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1) Department of Radiology, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, VD, Switzerland, 2) Center for Biomedical Imaging (CIBM), Lausanne, VD, Switzerland, 3) Institute of Electrical Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, VD, Switzerland 4) Institute of the Physics and Biological Systems, École Polytechnique Fédérale de Lausan...
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Synopsis We investigate the feasibility of using 2-D self-navigation for respiratory gating for free-breathing whole-heart 3-D CINE imaging, where respirationinduced cardiac motion may be more easily detected than in commonly used 1-D self-navigation methods. We compare self-navigation images, derived gating signals and resulting 3-D CINE images of the 1-D and 2-D methods and nd that respirator...
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PURPOSE To develop a fast and flexible free-breathing dynamic volumetric MRI technique, iterative Golden-angle RAdial Sparse Parallel MRI (iGRASP), that combines compressed sensing, parallel imaging, and golden-angle radial sampling. METHODS Radial k-space data are acquired continuously using the golden-angle scheme and sorted into time series by grouping an arbitrary number of consecutive sp...
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