Table 4.

Dice similarity scores (in %) of the segmentation network on 2D and 3D datasets, evaluated across different preprocessing methods.

	Original OCTA	Bscan normalization	Projection artifact attenuation	Filtering and contrast enhancement	Vesselness enhancement
2D U-Net	79.62 ± 8.45	81.94 ± 8.40	84.56 ± 9.07	86.34 ± 8.83	79.05 ± 5.68
3D U-Net	71.32 ± 12.69	71.14 ± 16.46	64.20 ± 18.08	66.70 ± 18.64	57.23 ± 16.36