Table 7. Average processing time(s) for the five algorithms on CT image sequences.

Types	Average Dataset size	ACM	Watershed	RG	Level set	GSLIC-SGNF
Without nodules	512*512*60	254.57	169.26	83.35	117.56	43.22
Benign nodules	512*512*59	250.42	164.45	81.22	114.28	41.69
Malignant SPN	512*512*60	235.51	162.88	78.92	111.36	41.18
Pleural nodules	512*512*62	246.84	168.23	83.25	118.23	42.76