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