TABLE 4.

Statistics analysis of leave‐one‐scanner‐out segmentation results and k‐fold cross‐validation results

Metrics	Leave‐one‐scanner‐out (mean ± Std)	k‐fold cross‐validation (mean ± Std)	p value
VS (%)	91.9 ± 6.2	92.2 ± 5.7	.268
HD95(mm)↓	1.86 ± 0.58	1.76 ± 0.51	<.001
DSC (%)	68.3 ± 5.0	69.5 ± 5.3	<.001

Note: Values in bold denote statistical significance.  Statistical differences between them with respect to HD95 and Dice score were observed. It indicated that testing on unseen scanners harms the segmentation performance.

Abbreviations: DSC, Dice similarity coefficient; HD95, 95th percentile of Hausdorff Distance; VS, volumetric similarity.