CT HU Reference Table (Elements)

This HU data table was calculated for elements from the NIST database, using various CT x-ray spectra calculated via the TASMIP algorithm. The procedure for calculation can be found in the CT HU Calcuation Lab.

Z	Density (g/cm³)	Element	HU Range	Mean HU
1	Hydrogen	8.375e-05	-1001 → -1001	-1001
2	Helium	0.0001663	-1001 → -1001	-1001
3	Lithium	0.534	-731 → -716	-724
4	Beryllium	1.848	101 → 142	119
5	Boron	2.37	661 → 697	677
6	Carbon, Graphite	1.7	441 → 451	445
7	Nitrogen	0.001165	-1000 → -1000	-1000
8	Oxygen	0.001332	-1000 → -1000	-1000
9	Fluorine	0.00158	-1000 → -999	-999
10	Neon	0.0008385	-1000 → -1000	-1000
11	Sodium	0.971	174 → 227	203
12	Magnesium	1.74	1317 → 1439	1383
13	Aluminum	2.699	2727 → 2951	2849
14	Silicon	2.33	2527 → 2765	2656
15	Phosphorus	2.2	2414 → 2665	2550
16	Sulfur	2	2366 → 2633	2511
17	Chlorine	0.002995	-996 → -996	-996
18	Argon	0.001662	-998 → -998	-998
19	Potassium	0.862	626 → 780	709
20	Calcium	1.55	2135 → 2448	2305
21	Scandium	2.989	4891 → 5501	5222
22	Titanium	4.54	8152 → 9134	8685
23	Vanadium	6.11	11552 → 12942	12306
24	Chromium	7.18	14655 → 16452	15630
25	Manganese	7.44	15583 → 17549	16650
26	Iron	7.874	17582 → 19849	18811
27	Cobalt	8.9	20346 → 23012	21792
28	Nickel	8.902	21890 → 24793	23464
29	Copper	8.96	21732 → 24682	23331
30	Zinc	7.133	17751 → 20239	19099
31	Gallium	5.904	14465 → 16553	15596
32	Germanium	5.323	13210 → 15161	14266
33	Arsenic	5.73	14692 → 16880	15877
34	Selenium	4.5	11368 → 13119	12316
35	Bromine	0.007072	-981 → -978	-979
36	Krypton	0.003478	-991 → -990	-990
37	Rubidium	1.532	3552 → 4223	3915
38	Strontium	2.54	6731 → 7879	7352
39	Yttrium	4.469	13083 → 15204	14230
40	Zirconium	6.506	19937 → 23118	21658
41	Niobium	8.57	27380 → 31746	29742
42	Molybdenum	10.22	33239 → 38541	36107
43	Technetium	11.5	38481 → 44666	41826
44	Ruthenium	12.41	42010 → 48782	45672
45	Rhodium	12.41	43081 → 50092	46872
46	Palladium	12.02	41981 → 48862	45701
47	Silver	10.5	37569 → 43802	40938
48	Cadmium	8.65	30671 → 35813	33450
49	Indium	7.31	26222 → 30673	28628
50	Tin	7.31	26324 → 30818	28753
51	Antimony	6.691	24278 → 28456	26536
52	Tellurium	6.24	22314 → 26192	24409
53	Iodine	4.93	18163 → 21362	19891
54	Xenon	0.005485	-980 → -976	-977
55	Cesium	1.873	6438 → 7692	7115
56	Barium	3.5	12905 → 15264	14179
57	Lanthanum	6.154	23942 → 28184	26233
58	Cerium	6.657	26597 → 31309	29142
59	Praseodymium	6.71	27537 → 32433	30181
60	Neodymium	6.9	28606 → 33727	31372
61	Promethium	7.22	30688 → 36162	33644
62	Samarium	7.46	31564 → 37235	34626
63	Europium	5.243	22261 → 26311	24448
64	Gadolinium	7.9	33842 → 39926	37127
65	Terbium	8.229	35942 → 42429	39444
66	Dysprosium	8.55	37619 → 44441	41302
67	Holmium	8.795	39134 → 46214	42956
68	Erbium	9.066	40913 → 48345	44925
69	Thulium	9.321	42805 → 50602	47014
70	Ytterbium	6.73	30637 → 36267	33676
71	Lutetium	9.84	45914 → 54293	50437
72	Hafnium	13.31	62774 → 74195	68939
73	Tantalum	16.65	79634 → 94115	87450
74	Tungsten	19.3	93278 → 110285	102458
75	Rhenium	21.02	102815 → 121585	112946
76	Osmium	22.57	110407 → 130494	121249
77	Iridium	22.42	111042 → 131296	121973
78	Platinum	21.45	106983 → 126540	117538
79	Gold	19.32	97628 → 115595	107324
80	Mercury	13.55	68420 → 81088	75256
81	Thallium	11.72	59076 → 70016	64980
82	Lead	11.35	57705 → 68448	63502
83	Bismuth	9.747	50001 → 59343	55042
84	Polonium	9.32	48654 → 57720	53546
85	Astatine	10	53153 → 63082	58510
86	Radon	0.009066	-954 → -945	-949
87	Francium	10	51999 → 61736	57253
88	Radium	5	25649 → 30551	28294
89	Actinium	10.07	53477 → 63520	58896
90	Thorium	11.72	62157 → 73805	68442
91	Protactinium	15.37	83800 → 99492	92266
92	Uranium	18.95	102291 → 121409	112606