Fig.2: Acquisition schemes presented used in this work, presented as a set of b-value ($$$b$$$) and b-shape ($$$b_\Delta$$$) shells. For the platonic-solid sampling scheme, b-tensor directions sets are shown as black dots (electrostatic repulsion)^8,9 or colored dots (platonic solids).^15,16 Other sampling schemes feature unspecific blue dots for directions. The conventional electrostatic sampling scheme was generated by setting the intra/inter shell optimization strength from Ref.[9] to $$$\alpha=0.75$$$.

Fig.3: Histograms showing the median and interquartile range over 50 Rician noise realizations at signal-to-noise ratio SNR=30 of the DTD statistical descriptors of interest estimated in the numerical systems of Fig.1 using the acquisition schemes of Fig.2, namely the electrostatic ("Elst.", blue), platonic-solid ("Plat.", green) and Frobenius-optimized ("Frob.", red) schemes. Purple lines: ground-truth values.