Multiresolution field map estimation using golden section search for water-fat separation
نویسندگان
چکیده
منابع مشابه
Hierarchical IDEAL – robust water-fat separation at high field by multiresolution field map estimation
Introduction In recent years, IDEAL (iterative decomposition of water and fat with echo asymmetry and least-squares estimation) [1] has gained considerable popularity as a practical method for acquiring high-quality fat and water images. At the core of IDEAL is a field-map estimation process, which is needed to properly assign signal components to the water and fat images. IDEAL holds particula...
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Water/fat separation in the presence of B 0 field inhomogeneity is a problem of considerable practical importance in MRI. This article describes two complementary methods for estimating the water/fat images and the field inhomogeneity map from Dixon-type acquisitions. One is based on variable projection (VARPRO) and the other on linear prediction (LP). The VARPRO method is very robust and can b...
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Water-fat separation techniques play an important role in a variety of clinical and research applications. In particular, multiecho separation methods remain a topic of great interest due to their ability to resolve water and fat images in the presence of B(0)-field inhomogeneity. However, these methods are inherently slow as they require multiple measurements. An accelerated technique with red...
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INTRODUCTION A recently developed joint estimation method for water/fat separation, based on a penalized maximum likelihood (PML) formulation and graph cuts optimization, is able to perform robustly in the presence of large B0 field inhomogeneities [1]. This method requires the acquisition of at least three images with different TE shifts, because the water and fat components of the signal are ...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2008
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.21544