Table 3.

Additional model parameters. See Visser et al. (2016) for the definitions of the symbols.

Part of model	Parameter	Symbol	Value
Both	Step size	$\mathcal{\ell }$	Half of voxel size
Number of steps	Δ	$2\times ⌊2\mathrm{mm}/\mathcal{\ell }⌋$
Shape model	MRF weight (substantia nigra and red nucleus)	w	10
MRF weight (subthalamic nucleus)	w	100
Intensity model	Prior standard deviation (T2⁎)	$\sqrt{\beta /f}$	0.1
Prior standard deviation (QSM)	$\sqrt{\beta /f}$	0.0003
Weight of prior mean	n0	3
Wishart shape parameter	α0	$\frac{k-1}{2}+3$
Dirichlet parameter for all components	α	2
Width of prior on δ	σδ	2 mm
Smoothness	σI	0.5