Table 6.

Median and standard deviation of Dice and IoU values computed from the binary segmentation masks predicted by two U-Nets for 191 image slices of the test set.

U-Net	Metric	Median	Std	Shapiro	t-test	Wilcoxon	F-test	Bartlett	Levene
64	Dice	0.484	0.300	1.11e−8	9.20e−5	1.52e−5	0.490	0.490	0.437
128	Dice	0.574	0.315	3.91e−10
64	IoU	0.320	0.259	1.38e−7	1.42e−5	6.44e−5	0.182	0.182	0.0337
128	IoU	0.403	0.285	1.90e−8

The U-Nets with different depths are distinguished here according to whether the maximum dimensionality of a Conv2D layer is 64 or 128. The table also contains the p values of Shapiro–Wilk tests for testing the normality separately for Dice and IoU values of each U-Net, and p values of t-tests, Wilcoxon tests, F-tests, Bartlett’s tests, and Levene’s tests comparing the two U-Nets.