منابع مشابه
Functional MRI using sensitivity-encoded echo planar imaging (SENSE-EPI).
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...
متن کاملEcho-Planar Cardiac MRI using Parallel Imaging
Since it’s original proposal by Mansfield et al. in 1977 [1], echo-planar imaging (EPI) has had a key role in the evolution of cardiac MRI. EPI involves the rapid acqusition of k-space data in a raster-like fashion, requiring a fewer number of excitations compared to conventional 2DFT imaging. This is crucial in cardiac imaging as respiratory and cardiac motion places high demands on imaging sp...
متن کاملQuiet echo planar imaging for functional and diffusion MRI
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...
متن کاملImprovements in parallel imaging accelerated functional MRI using multiecho echo-planar imaging.
Multiecho echo-planar imaging (EPI) was implemented for blood-oxygenation-level-dependent functional MRI at 1.5 T and compared to single-echo EPI with and without parallel imaging acceleration. A time-normalized breath-hold task using a block design functional MRI protocol was carried out in combination with up to four echo trains per excitation and parallel imaging acceleration factors R = 1-3...
متن کاملImproving diffusion MRI using simultaneous multi-slice echo planar imaging
In diffusion MRI, simultaneous multi-slice single-shot EPI acquisitions have the potential to increase the number of diffusion directions obtained per unit time, allowing more diffusion encoding in high angular resolution diffusion imaging (HARDI) acquisitions. Nonetheless, unaliasing simultaneously acquired, closely spaced slices with parallel imaging methods can be difficult, leading to high ...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1996
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00001354921