Table 9.

Statistical evaluation of models (mean ± standard deviation over 5 runs).

Dataset	Model	Accuracy (%)	Recall (%)	F1-score	ROC-AUC (%)
Polyp	U-Net	98.01 ± 0.31	99.48 ± 0.13	0.96 ± 0.01	97.88 ± 0.44
Skin cancer	VGG16 (Transfer)	91.12 ± 0.62	93.90 ± 0.29	0.89 ± 0.02	92.23 ± 0.51
Brain tumor	U-Net	84.30 ± 0.45	85.75 ± 0.35	0.82 ± 0.02	86.10 ± 0.42