Table 2.

Qualitative scores for the proposed vessel and solid core segmentations for observer 1 (O1), observer 2 (O2), and observer 3 (O3) separately, stratified by nodule type i.e. non-solid (NS) or part-solid (PS), both with or without vessels.

	Vessel									Solid Core
	Good			Acceptable			Unacceptable			Good			Acceptable			Unacceptable
	O1	O2	O3	O1	O2	O3	O1	O2	O3	O1	O2	O3	O1	O2	O3	O1	O2	O3
NS, no vessels	35	21	28	0	0	0	0	0	0	32	21	25	2	0	0	1	0	3
PS, no vessels	33	44	23	0	2	0	2	0	0	14	13	7	7	8	12	14	25	4
NS, vessels	27	23	22	10	7	35	4	6	17	35	31	59	3	2	7	3	3	8
PS, vessels	42	39	24	6	16	15	11	12	6	29	18	16	17	15	16	13	34	13
Total	137	127	97	16	25	50	17	18	23	110	83	107	29	25	35	31	62	28

The numbers indicate the number of nodules that were scored in that specific category.