Table 5.

Segmentation measure results (error rate)

CT image	The edge-based active contour model	The region- based active contour model	The traditional integrated active contour model	The proposed active contour model
GGO pulmonary nodule	Mean 0.31 Std. 0.11	Mean 0.36 Std. 0.13	Mean 0.36 Std. 0.09	Mean 0.17 Std. 0.07
Juxta-vascular pulmonary nodule	Mean 0.32 Std. 0.13	Mean 0.39 Std. 0.12	Mean 0.29 Std. 0.12	Mean 0.20 Std. 0.09
GGO Juxta-vascular nodule	Mean 0.43 Std. 0.12	Mean 0.47 Std. 0.09	Mean 0.41 Std. 0.13	Mean 0.24 Std. 0.08

Standard deviation (Std.)

“GGO nodule” and “Juxta-vascular nodule” do not include GGO Juxta- vascular pulmonary nodule in the table