Table 2.

HD comparison between the proposed method and the Flood fill method.

Target	Lung	Spinal cord	Tumor
			1	2	3	4	5
HD
Flood fill	54.21	6.07	3.23	9.18	2.23	20.42	6.18
Proposed	5.04	3.45	3.35	2.53	2.15	5.84	4.85
Improvement (%)	90.70	43.16	−3.72	72.44	3.59	71.40	21.52
Mean HD
Flood fill	7.58	1.71	0.63	2.85	0.83	3.38	2.61
Proposed	0.91	0.92	0.59	1.09	0.68	1.67	1.83
Improvement (%)	87.99	46.20	6.35	61.75	18.07	50.59	29.89