An Iterative Self-Navigation Approach to Improve Image Quality in Subjects with Irregular Breathing in Whole Heart Coronary MRA
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چکیده
An Iterative Self-Navigation Approach to Improve Image Quality in Subjects with Irregular Breathing in Whole Heart Coronary MRA. Giulia Ginami, Gabriele Bonanno, Juerg Schwitter, Matthias Stuber, and Davide Piccini Center for Biomedical Imaging (CIBM), Lausanne, Switzerland, Department of Radiology, University hospital (CHUV) and University of Lausanne (Unil), Lausanne, Switzerland, Department of Cardiology, University hospital (CHUV), Lausanne, Switzerland, Department of Radiology, Center for Biomedical Imaging (CIBM) and University hospital (CHUV), Lausanne, Switzerland, Advanced Clinical Imaging Technology, Siemens Healthcare IM BM PI, Lausanne, Switzerland
منابع مشابه
Reduction of respiratory motion artifacts for free-breathing whole-heart coronary MRA by weighted iterative reconstruction.
PURPOSE To combine weighted iterative reconstruction with self-navigated free-breathing coronary magnetic resonance angiography for retrospective reduction of respiratory motion artifacts. METHODS One-dimensional self-navigation was improved for robust respiratory motion detection and the consistency of the acquired data was estimated on the detected motion. Based on the data consistency, the...
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Background Navigator gating is commonly used to minimize respiratory motion in free-breathing whole-heart coronary MRA [1]. However, lengthy and unpredictable acquisition times remain a drawback. Respiratory self-navigation (SN) [2-3], conversely, enables 100% scan efficiency, but performs motion correction over a broad range of respiratory displacements, which can result in image artifacts. He...
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Background Free-breathing whole-heart coronary MR angiography (MRA) is an established method that can visualize all coronary arteries within a single acquisition. However, a long acquisition time and suboptimal arterial signal due to thick SLAB are major limitations of 3T gradient-echo whole-heart coronary MRA without contrast. Alternatively, target-volume coronary MRA can be used to visualize ...
متن کاملFeasibility and Diagnostic Accuracy of Whole Heart Coronary MR Angiography Using Free-Breathing 3D Balanced Turbo-Field-Echo with SENSE and the Half-Fourier Acquisition Technique
OBJECTIVE We wanted to assess the feasibility and diagnostic accuracy of whole heart coronary magnetic resonance angiography (MRA) with using 3D balanced turbo-field-echo (b-TFE) with SENSE and the half-Fourier acquisition technique for identifying stenoses of the coronary artery. MATERIALS AND METHODS Twenty-one patients who underwent both whole heart coronary MRA examinations and convention...
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We propose a simple but novel data acquisition technique for whole-heart coronary magnetic resonance angiography (CMRA). In this technique, the breath-hold chasing MRA, data are collected during breath-hold intervals, with the navigation window manually adjusted to the diaphragmatic level. Compared with the conventional free breathing MRA, this method provided 33% reduction of acquisition time ...
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تاریخ انتشار 2013