Table 2. Performance evaluation of lung tumor segmentation based on lung cancer size group. Mean and standard deviations are provided, with the highest values highlighted in bold. (%)

Method	Tumor size group	DSC	Recall	Precision
Unet	Group 1	69.04(8.11)	68.80(3.47)	74.89(14.28)
	Group 2	69.13(12.31)	79.32(14.24)	64.76(14.35)
	Group 3	68.17(9.56)	73.53(16.29)	71.48(12.13)
Unet3+	Group 1	70.23(9.81)	76.54(11.87)	68.93(11.9)
	Group 2	71.03(10.67)	85.17(11.61)	64.28(13.89)
	Group 3	69.93(8.7)	77.71(15.03)	72.08(13.06)
UNet3++ deep supervision+ HLF loss(Ours)	Group 1	72.41(10.05)	76.79(10.95)	72.39(12.96)
	Group 2	73.51(14.32)	79(19.55)	73.80(10.33)
	Group 3	71.46(9.86)	74.96(16.39)	76.78(11.92)