نتایج جستجو برای: echo planar imaging

تعداد نتایج: 526840  

Journal: :Magnetic resonance in medicine 2011
Joelle E Sarlls Carlo Pierpaoli S Lalith Talagala Wen-Ming Luh

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...

2006
Krishna S. Nayak Peter Kellman

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...

Journal: :Radiology 1990
R Turner D Le Bihan J Maier R Vavrek L K Hedges J Pekar

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...

2011
Jon K. Furuyama Brian L. Burns Neil E. Wilson M. Albert Thomas

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...

Journal: :Journal of Applied Clinical Medical Physics 2001

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