Table 2.

Image segmentation evaluation metrics of the tumor model in the development cohort and external validation cohort

	Development cohort (test set)	External validation cohort
Global DSC	0.86	0.82
Per-case DSC (IQR)	0.80 (0.67−0.87)	0.60 (0.29−0.76)
Intersection-over-union	0.75	0.69
Precision	0.89	0.85
Recall	0.84	0.78
True positive (voxels)	13,170,769	733,046
False positive (voxels)	1,755,261	127,677
False negative (voxels)	2,553,727	203,102
True negative (voxels)	96,3282,7315	2,631,648,367

DSC Dice similarity coefficient, IQR Interquartile range