Table 2.

Parameters of the level-set-based segmentation algorithm for different segmentation steps.

	Whole brain	Contralateral ventricle	Ventricles	Stroke
I(x)	4th echo	T2 map	T2 map	T2 map
P(I(x); Ω O)	Gaussian	Gaussian	Histogram; fixed	Histogram
P(I(x); Ω B)	Gaussian	Gaussian	Histogram	Histogram; fixed
Ω	ℝ3	RCBH	RWB	RIBH\(RV ∪ MPVZ)
ϕ0(x)	MWB	MCV	MV	$R_s^{init}$
α	5	0.1	2	0.3
μ	2	0	1.5	0
niter	80	120	120	80
g(x)	−	−	+	−