METHOD AND APPARATUS FOR RECORDING OF DIFFUSION-WEIGHTED MAGNETIC RESONANCE IMAGE DATA WITH ANISOTROPIC DIFFUSION DIRECTIONS
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United States of America Patent
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Nov 9, 2017
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May 8, 2017
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May 9, 2016
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Abstract
In a method and a magnetic resonance apparatus for diffusion-weighted imaging, diffusion gradients for acquiring diffusion-weighted image data, with anisotropic diffusion directions, are determined by defining a space of achievable diffusion gradient vectors as a cuboid, and then defining a spherical shell around the gradient axes in order to determine specific values of the gradient amplitudes. The resulting diffusion gradient vectors have a direct influence on the achievable signal-to-noise ratio of an individual scan, and the method and apparatus enable an advance selection of a desired effective gradient amplitude, and the presentation to a user of candidate diffusion gradient vectors that satisfy the desired requirements.
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