Two-point dixon method with flexible echo times
نویسندگان
چکیده
منابع مشابه
Two-point Dixon imaging with flexible echo times and a region growing-based postprocessing algorithm
Introduction: The scan time for a two-point Dixon technique using dual-echo acquisition can become comparable with that for a conventional non-Dixon technique with similar scan parameters (1, 2). Recently, Xiang and Eggers et al. showed that images with echo times that are more flexible than being in-phase and out-of-phase can be used for two-point Dixon processing (3, 4). This increased flexib...
متن کاملDirect water and fat determination in two-point Dixon imaging with flexible echo times.
PURPOSE Identifying water and fat unambiguously in multipoint Dixon imaging often requires phase correction, which can be challenging and may fail. The purpose of this work is to present a geometric interpretation of the two-point Dixon method with flexible echo times (TEs) and to investigate the conditions under which water and fat can be determined directly without phase correction. METHODS...
متن کاملTwo-point water-fat imaging with partially-opposed-phase (POP) acquisition: an asymmetric Dixon method.
A novel two-point water-fat imaging method is introduced. In addition to the in-phase acquisition, water and fat magnetization vectors are sampled at partially-opposed-phase (POP) rather than exactly antiparallel as in the original Dixon method. This asymmetric sampling encodes more valuable phase information for identifying water and fat. From the magnitudes of the two complex images, a big an...
متن کاملFat Suppressed FSE Pelvic MR Imaging with Two New FSE Based Dixon Pulse Sequences: A Comparison of IDEAL FSE and FSE Triple Echo Dixon
Background: Fat suppressed FSE T2-weighted imaging is an integral part of an MR pelvic examination. However, fat suppression by conventional technique can be degraded by inhomogeneities of the magnetic field. The problem can be exacerbated when a typical large FOV is used for abdominal and pelvic imaging. Techniques that provide fat-suppressed T2-weighted imaging that is insensitive to field in...
متن کامل[Modified DIXON: examination of the different flip angles and echo times for water-fat separation and contrast].
The method known as DIXON is imaging from two different echo times (TE), using the opposite phase of water and fat. Modified DIXON (mDIXON) is the method that is calculated from changing the opposing phases 'in' and 'opposed' phases of the actual measurement, to fit the theoretical value. We reviewed that the effect of the water-fat separation and contrast depended on the different flip angles ...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2010
ISSN: 0740-3194
DOI: 10.1002/mrm.22679