Table 2.

Function strategy in the HFS-Net

	Phase	Neural network	Loss function
f liver	Portal-venous	2D DenseU-Net	cross entropy + dice loss
f size	Dynamic	2D DenseU-Net	focal loss + dice loss
f large	Portal-venous	2D U-Net	cross entropy
f small	Dynamic	2D DenseU-Net	focal loss + dice loss
f 3D	Portal-venous	3D U-Net	focal loss + dice loss

Dynamic CT images include non-contrast, arterial, and portal-venous phases