Table 2. Five-fold cross-validation experimental results of OARs.

Experiment number	Bladder				Rectum				Small intestine				Sigmoid colon
	DSC	HD	OI		DSC	HD	OI		DSC	HD	OI		DSC	HD	OI
First experiment	0.929	27.4606	0.958		0.766	5.796	0.944		0.628	54.533	0.719		0.743	56.939	0.861
Second experiment	0.972	6.265	0.969		0.949	3.111	0.943		0.627	77.074	0.702		0.492	92.025	0.575
Third experiment	0.971	21.5508	0.973		0.958	2.573	0.963		0.640	67.819	0.690		0.602	47.619	0.702
Fourth experiment	0.973	6.252	0.964		0.956	2.225	0.950		0.519	81.065	0.653		0.685	80.181	0.679
Fifth experiment	0.978	3.989	0.972		0.884	4.123	0.952		0.745	47.389	0.782		0.742	29.899	0.772

OAR, organ at risk; DSC, Dice similarity coefficient; HD, Hausdorff distance; OI, overlap index.