نتایج جستجو برای: echo planar imaging
تعداد نتایج: 526840 فیلتر نتایج به سال:
Single-shot echo-planar imaging is the most common acquisition technique for whole-brain diffusion tensor imaging (DTI) studies in vivo. Higher field MRI systems are readily available and advantageous for acquiring DTI due to increased signal. One of the practical issues for DTI with single-shot echo-planar imaging at high-field is incomplete fat suppression resulting in a chemically shifted fa...
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...
The recently established single-shot technique of echo-planar imaging of intravoxel incoherent motion (IVIM) for determining and imaging the variations of microscopic motions of water has been applied to studies of water perfusion in phantoms and to in vivo studies of diffusion and perfusion in cat and human brains. The phantom results demonstrate that perfusion levels comparable with those fou...
The use of spin-echoes has been employed in an Echo-Planar Spectroscopic Imaging (EPSI) sequence to collect multiple phase encoded lines within a single TR in a Multi-Echo-based Echo-Planar Spectroscopic Imaging technique (MEEPSI). Despite the T₂ dependence on the amplitude of the spin-echoes, the Full Width at Half Maximum (FWHM) of the derived multi-echo Point Spread Function (PSF) is shown t...
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