Table 2.

List of ICRU 44 human tissues and calculated CT numbers using the HS method and the Bourque (B) method

#	Tissue	80 kVp		150 kVp/Sn		#	Tissue	80 kVp		150 kVp/Sn
		HS	B	HS	B			HS	B	HS	B
1	Adipose	915	904	949	955	18	Red Marrow	1012	1007	1027	1028
2	Blood	1065	1067	1059	1059	19	Yellow Marrow	942	930	979	987
3	Brain	1046	1046	1043	1043	20	Skin	1079	1076	1084	1084
4	Breast	999	993	1017	1018	21	Spleen	1063	1063	1060	1059
5	Cell Nucleus	1017	1022	1005	1005	22	Testis	1041	1041	1040	1040
6	Eye Lens	1053	1049	1061	1061	23	Thyroid	1099	1111	1060	1061
7	GI Tract	1028	1027	1031	1031	24	Skeleton — Cortical	2986	3031	2056	2050
8	Heart	1065	1066	1060	1060	25	Skeleton — Cranium	2300	2351	1698	1714
9	Kidney	1051	1051	1049	1049	26	Skeleton — Femur	1731	1776	1385	1403
10	Liver	1061	1062	1059	1058	27	Skeleton — Humerus	1988	2037	1529	1547
11	Lung (deflated)	1053	1054	1050	1049	28	Skeleton — Mandible	2448	2499	1778	1791
12	Lung (inflated)	248	261	257	260	29	Skeleton — Ribs (2nd, 6th)	1854	1901	1466	1485
13	Lymph	1036	1036	1034	1034	30	Skeleton — Ribs (10th)	2098	2148	1594	1612
14	Muscle	1050	1050	1048	1048	31	Skeleton — Sacrum	1590	1632	1327	1343
15	Ovary	1053	1053	1051	1051	32	Skeleton — Spongiosa	1380	1413	1207	1218
16	Pancreas	1037	1035	1041	1041	33	Skeleton — Vertebra (C4)	1881	1929	1478	1497
17	Cartilage	1120	1126	1097	1097	34	Skeleton — Vertebra (D6, L3)	1685	1729	1375	1392