Chemical shift encoded water-fat separation using parallel imaging and compressed sensing
نویسندگان
چکیده
منابع مشابه
Compressed sensing for chemical shift-based water-fat separation.
Multi echo chemical shift-based water-fat separation methods allow for uniform fat suppression in the presence of main field inhomogeneities. However, these methods require additional scan time for chemical shift encoding. This work presents a method for water-fat separation from undersampled data (CS-WF), which combines compressed sensing and chemical shift-based water-fat separation. Undersam...
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PURPOSE Conventional fat/water separation techniques require that patients hold breath during abdominal acquisitions, which often fails and limits the achievable spatial resolution and anatomic coverage. This work presents a novel approach for free-breathing volumetric fat/water separation. METHODS Multiecho data are acquired using a motion-robust radial stack-of-stars three-dimensional GRE s...
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Although magnetic resonance imaging (MRI) is routinely used in clinical practice, long acquisition times limit its practical utility in many applications. To increase the data acquisition speed of MRI, parallel MRI (pMRI) techniques have recently been proposed. These techniques utilize multi-channel receiver arrays and are based on simultaneous acquisition of data from multiple receiver coils. ...
متن کاملChemical shift-based water/fat separation: comparison of fitting models
INTRODUCTION Quantitative water/fat separation in MRI requires careful modeling of the acquired signal. Multiple signal models have been proposed in recent years, but their relative performance has not yet been established. This abstract presents a comparative study of 12 signal models for water/fat separation. The models were selected according to three criteria: magnitude or complex fitting [...
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Objective: Iterative Decomposition of water and fat with Echo Asymmetry and Least squares estimation (IDEAL) is a chemical shift based fat-water separation method that can be combined with unspoiled Gradient Recalled-echo Acquired in the Steady-State (GRASS) technique to produce high resolution, fat-suppressed images of the knee with bright synovial fluid (1). IDEAL-GRASS has high diagnostic pe...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2012
ISSN: 0740-3194
DOI: 10.1002/mrm.24270