. Author manuscript; available in PMC: 2014 Feb 14.

Published in final edited form as: IEEE Trans Med Imaging. 2012 Aug 7;31(10):1965–1976. doi: 10.1109/TMI.2012.2211887

Table 2.

Volume Error (VER) for liver segmentation from the clinical test data (5mm slice thickness). The initial automatic segmentation results are compared to results following shape analysis and corrected (final) segmentation; p-values were calculated via the Wilcoxon rank sum test. Variability in initial VER ranged from <2% to >50%; cases were separated into severe errors (VER>10%) and small/moderate errors (VER<10%). Cases with small errors, large errors and hepatic tumors are shown separately. Additionally, the last row presents the results on the MICCAI dataset (slice thickness 1-5mm).

Group/VER (%)	Initial Segmentation	Final Segmentation	p-value
Small Error (n=31)	5.3±2.4	2.9±2.2	<0.001
Severe Error (n=19)	28.9±14.3	6.6±7.3	<0.001
Tumors (n=22)	17.0±15.8	5.2±6.9	<0.001
All clinical cases (n=50)	9.3±13.5	3.8±5.3	<0.001
MICCAI (n=10)	-	2.2±2.3	-