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Self-Gated Free-Breathing 3D Coronary CINE Imaging with Simultaneous Water and Fat Visualization

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      Abstract

      The aim of this study was to develop a novel technique for acquiring 3-dimensional (3D) coronary CINE magnetic resonance images with both water and fat visualization during free breathing and without external respiratory or cardiac gating. The implemented multi-echo hybrid 3D radial balanced Steady-State Free Precession (SSFP) sequence has an efficient data acquisition and is robust against motion. The k-space center along the slice encoding direction was repeatedly acquired to derive both respiratory and cardiac self-gating signals without an increase in scan time, enabling a free-breathing acquisition. The multi-echo acquisition allowed image reconstruction with water-fat separation, providing improved visualization of the coronary artery lumen. Ten healthy subjects were imaged successfully at 1.5 T, achieving a spatial resolution of 1.0×1.0×3.0 mm 3 and scan time of about 5 minutes. The proposed imaging technique provided coronary vessel depiction comparable to that obtained with conventional breath-hold imaging and navigator gated free-breathing imaging.

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      Most cited references 34

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        In this study, a novel partially parallel acquisition (PPA) method is presented which can be used to accelerate image acquisition using an RF coil array for spatial encoding. This technique, GeneRalized Autocalibrating Partially Parallel Acquisitions (GRAPPA) is an extension of both the PILS and VD-AUTO-SMASH reconstruction techniques. As in those previous methods, a detailed, highly accurate RF field map is not needed prior to reconstruction in GRAPPA. This information is obtained from several k-space lines which are acquired in addition to the normal image acquisition. As in PILS, the GRAPPA reconstruction algorithm provides unaliased images from each component coil prior to image combination. This results in even higher SNR and better image quality since the steps of image reconstruction and image combination are performed in separate steps. After introducing the GRAPPA technique, primary focus is given to issues related to the practical implementation of GRAPPA, including the reconstruction algorithm as well as analysis of SNR in the resulting images. Finally, in vivo GRAPPA images are shown which demonstrate the utility of the technique. Copyright 2002 Wiley-Liss, Inc.
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            Author and article information

            Affiliations
            [1 ]Department of Radiology, Weill Cornell Medical College, New York, New York, United States of America
            [2 ]Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California, United States of America
            Centre Hospitalier Universitaire Vaudois, Switzerland
            Author notes

            Competing Interests: The authors have declared that no competing interests exist.

            Conceived and designed the experiments: JL TDN. Performed the experiments: JL TDN YZ. Analyzed the data: JL TDN MRP JWW YW. Contributed reagents/materials/analysis tools: DS YW. Wrote the paper: JL TDN PS YW.

            Contributors
            Role: Editor
            Journal
            PLoS One
            PLoS ONE
            plos
            plosone
            PLoS ONE
            Public Library of Science (San Francisco, USA )
            1932-6203
            2014
            20 February 2014
            : 9
            : 2
            3930724
            PONE-D-13-20315
            10.1371/journal.pone.0089315
            (Editor)

            This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

            Counts
            Pages: 8
            Funding
            Funding came from National Institutes of Health: NIH R01HL062994, NIH R01HL064647, NIH K25EB014914. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
            Categories
            Research Article
            Biology
            Anatomy and physiology
            Cardiovascular system
            Engineering
            Signal processing
            Image processing
            Medicine
            Anatomy and physiology
            Cardiovascular system
            Cardiovascular
            Cardiovascular imaging
            Non-clinical medicine
            Health care policy
            Screening guidelines
            Public health
            Health screening
            Radiology
            Diagnostic radiology
            Magnetic resonance imaging

            Uncategorized

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