Table 5. Effect of data augmentation on the four best-performing CNN models.

Method	DSC difference
U-Net-ResNet34	+0.754
U-Net-MobileNet	+0.051
LinkNet-ResNet34	+0.742
LinkNet-MobileNet	+0.054

Figures indicate the average DSC difference to the baseline (training without data augmentation). CNN, convolutional neural networks; DSC, Sørensen-Dice coefficient.