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The effect of the number of gradient directions, and maximum SH order on the log(TH) (A, B) and Number of Peaks (C) are shown as an ROI-based analysis for a b-value of 2,000 s/mm2. Maximum SH order fit is indicated by line style (dotted line=4th order; dash-dot=6th order; dashed=8th order; solid=10th order). For results at all b-values, see Supplementary Figure 3.
