منابع مشابه
Echo-planar imaging.
Echo-planar imaging is a fast magnetic resonance (MR) imaging technique that allows acquisition of single images in as little as 20 msec and performance of multiple-image studies in as little as 20 seconds. Echo-planar imaging achieves its speed by obtaining all spatial-encoding information after a single radio-frequency (RF) excitation. Conventional imaging requires multiple-RF excitations, se...
متن کاملReferenceless interleaved echo-planar imaging.
Interleaved echo-planar imaging (EPI) is an ultrafast imaging technique important for applications that require high time resolution or short total acquisition times. Unfortunately, EPI is prone to significant ghosting artifacts, resulting primarily from system time delays that cause data matrix misregistration. In this work, it is shown mathematically and experimentally that system time delays...
متن کاملCorrecting dynamic distortions in 7T echo planar imaging using a jittered echo time sequence
PURPOSE To develop a distortion correction method for echo planar imaging (EPI) that is able to measure dynamic changes in B0 . THEORY AND METHODS The approach we propose is based on single-echo EPI with a jittering of the echo time between two values for alternate time points. Field maps are calculated between phase images from adjacent volumes and are used to remove distortion from correspo...
متن کاملCenter-out echo-planar spectroscopic imaging with correction of gradient-echo phase and time shifts.
A procedure to prevent the formation of image and spectral Nyquist ghosts in echo-planar spectroscopic imaging is introduced. It is based on a novel Cartesian center-out echo-planar spectroscopic imaging trajectory, referred to as EPSICO, and combined with a correction of the gradient-echo phase and time shifts. Processing of homogenous sets of forward and reflected echoes is no longer necessar...
متن کاملParallel Line-scan Echo-planar Spectroscopic Imaging
Y. Bito, T. Shirai, S. Hirata, Y. Taniguchi, K. Hirata, Y. Otake, Y. Soutome, H. Ochi, T. Ebisu, Y. Kawai, M. Umeda, T. Higuchi, and C. Tanaka Central Research Laboratory, Hitachi, Ltd., Kokubunji-shi, Tokyo, Japan, Neurosurgery, Nantan General Hospital, Kyoto, Japan, Medical Informatics, Meiji University of Integrative Medicine, Kyoto, Japan, Neurosurgery, Meiji University of Integrative Medic...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2019
ISSN: 0740-3194
DOI: 10.1002/mrm.27673