Table 5.

Comparison of the different models considered in the ablation experiments.

	Model
Metric	Baseline	No biophysical maps	No multitask	No pretraining	Diffusion only	MT only	50% samples in pretraining	75% samples in pretraining
Genu (% error in mean)	4.32% $\pm$ 4.86%	4.56% $\pm$ 4.67%	4.77% $\pm$ 5.14%	4.77% $\pm$ 4.97%	4.33% $\pm$ 4.50%	4.59% $\pm$ 4.61%	4.65% $\pm$ 4.83%	6.30% $\pm$ 6.91%
Body (% error in mean)	2.79% $\pm$ 2.73%	2.55% $\pm$ 2.17%	3.40% $\pm$ 3.39%	2.41% $\pm$ 2.30%	2.08% $\pm$ 1.78%	2.66% $\pm$ 2.66%	2.59% $\pm$ 2.38%	3.07% $\pm$ 2.77%
Splenium (% error in mean)	3.02% $\pm$ 2.30%	2.56% $\pm$ 2.04%	2.33% $\pm$ 1.91%	3.37% $\pm$ 2.97%	2.64% $\pm$ 2.26%	3.28% $\pm$ 2.69%	3.25% $\pm$ 2.98%	4.59% $\pm$ 3.87%
Genu effect size	1.76 $\pm$ 1.23	1.32 $\pm$ 1.30	1.13 $\pm$ 0.88	1.53 $\pm$ 1.39	1.09 $\pm$ 1.06	1.83 $\pm$ 1.61	1.41 $\pm$ 1.00	0.62 $\pm$ 0.45
Body effect size	3.02 $\pm$ 3.19	1.57 $\pm$ 1.65	2.86 $\pm$ 3.05	2.08 $\pm$ 1.96	2.70 $\pm$ 2.77	0.91 $\pm$ 0.61	1.96 $\pm$ 2.06	1.98 $\pm$ 2.20
Splenium effect size	-0.39 $\pm$ -0.29	-0.48 $\pm$ -0.38	-0.49 $\pm$ -0.47	-0.09 $\pm$ -0.06	0.17 $\pm$ 0.33	1.06 $\pm$ 1.42	0.14 $\pm$ 0.18	-0.12 $\pm$ -0.05
JSD g-ratio	0.24 $\pm$ 0.25	0.23 $\pm$ 0.23	0.23 $\pm$ 0.23	0.28 $\pm$ 0.28	0.24 $\pm$ 0.24	0.22 $\pm$ 0.22	0.24 $\pm$ 0.23	0.29 $\pm$ 0.30
KLD g-ratio	1.42 $\pm$ 1.53	1.20 $\pm$ 1.20	0.96 $\pm$ 0.95	2.07 $\pm$ 2.11	1.13 $\pm$ 1.17	0.78 $\pm$ 0.78	0.96 $\pm$ 0.96	2.18 $\pm$ 2.39
JSD axon diameter	0.23 $\pm$ 0.23	0.23 $\pm$ 0.23	0.23 $\pm$ 0.23	0.26 $\pm$ 0.26	0.22 $\pm$ 0.21	0.23 $\pm$ 0.23	0.23 $\pm$ 0.23	0.28 $\pm$ 0.28
KLD axon diameter	1.32 $\pm$ 1.38	1.28 $\pm$ 1.35	1.28 $\pm$ 1.30	1.84 $\pm$ 2.00	0.85 $\pm$ 0.89	1.24 $\pm$ 1.29	1.14 $\pm$ 1.21	1.75 $\pm$ 1.91