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Dependence of the ratio of the spherical mean of the linear tensor encoded signal (eq. 5) over the spherical tensor encoded signal on the microscopic anisotropy multiplied by the b-value (blue). As the microscopic anisotropy (or b-value) increases the ratio increases from a ratio of one for an isotropic medium. The second-order Taylor expansion (eq. 8) has been overlaid in orange.
