Improved echo volumar imaging (EVI) for functional MRI
نویسندگان
چکیده
منابع مشابه
High temporal resolution functional MRI using parallel echo volumar imaging.
PURPOSE To combine parallel imaging with 3D single-shot acquisition (echo volumar imaging, EVI) in order to acquire high temporal resolution volumar functional MRI (fMRI) data. MATERIALS AND METHODS An improved EVI sequence was associated with parallel acquisition and field of view reduction in order to acquire a large brain volume in 200 msec. Temporal stability and functional sensitivity we...
متن کاملGeometric distortion correction in echo volumar imaging
Introduction: Echo volumar imaging (EVI) is a 3D extension of echo-planar imaging (EPI) that allows data from an entire volume to be acquired following a single excitation. However, only a few studies to date have applied EVI to functional MRI (fMRI) due to its high sensitivity to field-inhomogeneity induced distortions. In this study, we extend two EPI distortion correction techniques to EVI: ...
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PURPOSE To develop a purpose-built quiet echo planar imaging capability for fetal functional and diffusion scans, for which acoustic considerations often compromise efficiency and resolution as well as angular/temporal coverage. METHODS The gradient waveforms in multiband-accelerated single-shot echo planar imaging sequences have been redesigned to minimize spectral content. This includes a s...
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Introduction In recent years, there have been many developments in the field of fast preclinical imaging based on EPI sequences whether to study brain function with BOLD-fMRI [1], brain anatomy with DWI [2] or image the accumulation of contrast media in tissue with DCE-MRI [3]. Echo Volumar Imaging (EVI) is a 3D extension of EPI that possess the same advantages (elevated signal-to-noise ratio, ...
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Parallel imaging methods become increasingly available on clinical MR scanners. To investigate the potential of sensitivity-encoded single-shot EPI (SENSE-EPI) for functional MRI, five imaging protocols at different SENSE reduction factors (R) and matrix sizes were compared with respect to their noise characteristics and their sensitivity toward functional activation in a motor task examination...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2006
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.21080