Autocalibrating motion-corrected wave-encoding for highly accelerated free-breathing abdominal MRI
نویسندگان
چکیده
منابع مشابه
Motion corrected compressed sensing for free-breathing dynamic cardiac MRI.
Compressed sensing (CS) has been demonstrated to accelerate MRI acquisitions by reconstructing sparse images of good quality from highly undersampled data. Motion during MR scans can cause inconsistencies in k-space data, resulting in strong motion artifacts in the reconstructed images. For CS to be useful in these applications, motion correction techniques need to be combined with the undersam...
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Background Phase-contrast MRI encodes speed and direction of moving spins by means of toggling a bipolar gradient. It is a valuable tool for assessing conditions affecting the vascular system by measuring the velocity of flowing blood[2]. Clinically, this sequence is performed in breath-hold or in free breathing but, in the latter case, using signal averaging. We propose to demonstrate the feas...
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Introduction: Compressed Sensing (CS) has been demonstrated to reconstruct sparse MR images of adequate quality from highly undersampled data [1], resulting in reduced scan times. In MRI, extensive motion during the acquisition (e.g. respiratory motion in cardiac scans) can cause inconsistencies in the k-space data, introducing blurring and ghosting like motion artefacts in the reconstructed im...
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PURPOSE Develop a nonrigid motion corrected reconstruction for highly accelerated free-breathing three-dimensional (3D) abdominal images without external sensors or additional scans. METHODS The proposed method accelerates the acquisition by undersampling and performs motion correction directly in the reconstruction using a general matrix description of the acquisition. Data are acquired usin...
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Audience: Interventionalists, and those interested in atherosclerosis and intravascular MR imaging. Purpose. Current speeds for intravascular (IV) MRI and MRI endoscopy are limited to ~2frames/s at 3T, rendering high-resolution (~100μm) images susceptible to degradation by physiological motion on the order of mm/ms. Here, using projection reconstruction we: (A) reduce sensitivity to motion from...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2016
ISSN: 0740-3194
DOI: 10.1002/mrm.26567