Table 1. Five-fold cross-validation experimental results of CTV.

Experiment number	DSC			HD			OI
	Mean	Var		Mean	Var		Mean	Var
First experiment	0.832	0.073		9.589	4.076		0.826	0.142
Second experiment	0.836	0.088		9.242	5.079		0.788	0.139
Third experiment	0.796	0.270		9.525	5.034		0.769	0.271
Fourth experiment	0.831	0.100		8.490	2.880		0.848	0.179
Fifth experiment	0.722	0.111		14.581	5.513		0.612	0.176

CTV, clinical target volume; DSC, Dice similarity coefficient; HD, Hausdorff distance; OI, overlap index.