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Various 3D golden-angle sampling schemes. (a) Stack-of-stars scheme, in which radial sampling is implemented in the kx–ky plane and Cartesian sampling is implemented in the kz plane; (b) Stack-of-spiral scheme, in which spiral sampling is implemented in the kx–ky plane and Cartesian sampling is implemented in the kz plane; (c) 3D Cartesian sampling, in which the k-space sampling in the ky–kz plane is segmented into multiple interleaves rotated by a golden-angle.
