Table 5.

Five-fold cross-validation results (mean (SD) across folds).

Augmentation	Evaluation set	Dice	IoU	Boundary F1	HD95 (px)
Standard	Internal BUS test	0.756 (0.003)	0.642 (0.003)	0.176 (0.003)	98.0 (1.3)
Standard	CEUS domain-shift test	0.454 (0.016)	0.313 (0.015)	0.039 (0.007)	205.1 (3.7)
Combined	Internal BUS test	0.752 (0.003)	0.637 (0.003)	0.175 (0.003)	97.6 (0.8)
Combined	CEUS domain-shift test	0.463 (0.016)	0.324 (0.016)	0.045 (0.004)	200.6 (8.5)