Field Map Estimation for Effective Fat Quantification at High Field MRI
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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High fields yield benefits such as higher sensitivity along with specific problems water-fat shift in the image or stronger susceptibility artifacts. Measurement in small animals is more problematic than in humans because the high field necessary to reach better sensitivity causes stronger susceptibility artifacts and requires shortening of specific time intervals used for encoding of the speci...
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The success of parallel reconstruction methods and their impact on image encoding has sparked a great deal of interest in using the spatial distribution of transmit coils in an analogous fashion. Namely, by breaking down the transmit field into multiple regions each controlled by a separate transmit channel, spatial degrees of freedom are created that allow the spatial information in the array ...
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ژورنال
عنوان ژورنال: The Journal of the Korea Contents Association
سال: 2014
ISSN: 1598-4877
DOI: 10.5392/jkca.2014.14.11.558