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Time‐varying view angle tilting with spiral readout gradients
Author(s) -
Zho SangYoung,
Kim DongHyun
Publication year - 2012
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.24125
Subject(s) - spiral (railway) , cartesian coordinate system , pulse sequence , imaging phantom , physics , fourier transform , plane (geometry) , distortion (music) , sampling (signal processing) , pulse (music) , trajectory , optics , flip angle , sequence (biology) , field of view , computer science , nuclear magnetic resonance , geometry , mathematical analysis , chemistry , magnetic resonance imaging , mathematics , medicine , amplifier , biochemistry , optoelectronics , cmos , quantum mechanics , astronomy , radiology , detector
The conventional Fourier‐transform‐based spin‐echo sequence with a view angle tilting gradient during data acquisition can correct the in‐plane distortion induced by a chemical shift or B0 field inhomogeneity. However, when extended for 3D applications, alternate k ‐space sampling can be beneficial for reducing the lengthy scan time. As spiral trajectories have high k ‐space acquisition efficiency, we investigated the applicability of spiral trajectory on a spin‐echo view angle tilting pulse sequence. Computer simulations and phantom and in vivo experiments were performed to validate the usage of spiral readout gradients in the presence of a view angle tilting gradient. The results show that as long as the readout time is comparable to Cartesian readout, the resulting images have similar quality. Magn Reson Med, 2012. © 2011 Wiley Periodicals, Inc.