Method and apparatus for recording of diffusion-weighted magnetic resonance image data with anisotropic diffusion directions

摘要

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.