Table 4.

Average symmetric surface distance (ASSD) calculated over deformed pelvic masks and the ground-truth masks for the different variants of DIRNet models. Results are given for the entire DIRNet models for the cervix, bladder, and rectum

		Average symmetric surface distance (ASSD)
		Cervix (mean ± SD)	Bladder (mean ± SD)	Rectum (mean ± SD)
Before registration		4.00 ± 1.82 mm	2.68 ± 1.09 mm	7.70 ± 3.90 mm
SimpleElastix		2.94 ± 0.78	3.26 ± 0.74	3.04 ± 1.50
DIRNet	Base model	1.85 ± 0.45	1.52 ± 0.86	1.97 ± 0.78
	2	2.63 ± 1.01	3.46 ± 0.90	3.70 ± 2.75
	3	2.86 ± 0.65	2.87 ± 2.37	2.92 ± 0.94
	4	1.61 ± 0.46	1.17 ± 0.15	1.06 ± 0.42