Table 3.

Segmentation performance of the full two-step segmentation pipeline, compared with ACA-UNet, our multi-organ segmentation model.

Model	Metric	Prostate	Bladder	Rectum	SV	Femoral heads	Average
ACA-UNet	DSC	0.853 ± 0.045	0.956 ± 0.015	0.832 ± 0.062	0.744 ± 0.116	0.935 ± 0.017	0.864 ± 0.051
	HD95	4.91 ± 1.16	2.96 ± 0.404	6.07 ± 2.54	6.60 ± 9.31	3.09 ± 1.05	4.73 ± 2.90
Two-step Pipeline	DSC	0.867 ± 0.042	0.957 ± 0.015	0.858 ± 0.039 *	0.752 ± 0.089	0.942 ± 0.016 *	0.875 ± 0.040 *
	HD95	4.35 ± 1.30 *	2.91 ± 0.290	4.95 ± 1.35 *	4.10 ± 1.29 *	3.03 ± 1.38 *	3.87 ± 1.12 *

^*denotes statistically significant improvement over ACA-UNet ($p<0.05$ using Wilcoxon signed-rank test). SV: seminal vesicles. Bold indicates the best performance for each organ.