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Dependence of magnitude (a and b) and phase (c and d) signal changes in the direction of B⃗0. (a), (c) and (b), (d) show the results of tissue 1 and 2, respectively. The direction of B⃗0 is specified by the zenith angle of B⃗0 from the positive y-axis (θ) and the azimuth angle of B⃗0 in the x-z plane from the positive x-axis (ϕ).
