Table 4.

Summary of active contour approaches for liver vessel segmentation (segmentation metrics are given in Table 2). CTA: computed tomography angiography, MR: magnetic resonance.

Author	Testing Dataset	Synthetic Data Used	Metrics Results
Zeng et al. [7]	12 CTA volumes	Yes	$Ac=0.98,Sens=0.68,Spec=0.99,$
			$DSC=0.73,JSC=0.66,RMSD=2.56$ mm
Chung et al. [8]	50 CTA images	No	$DSC=0.96$
Lu et al. [9]	5 MR volumes	No	$TPR=0.81,FPR=0.02,DSC=0.81$
Cheng et al. [10]	3 CTA datasets	Yes	$JSC,Visual$
Shang et al. [11]	20 CTA volumes	Yes	$Visual$