TABLE 1

Selected Organ Masses (g) for Adult Male Models

Organ	10th percentile	25th percentile	50th ICRP reference	75th percentile	90th percentile
Adrenals	11.88	12.65	14	14.93	15.94
Brain	1,291	1,405	1,450	1,493	1,527
Esophagus	36.17	39.29	40	43.26	46.52
Eyes	13.6	14.82	15	15.16	16.82
Gallbladder	62.54	68.13	68	71.65	79.82
Stomach	341	370.8	400	419.1	443.7
Small intestine	595	648.7	650	682.3	779.4
Right colon	141	154	150	170	186
Left colon	133	146	150	159	174
Rectosigmoid	61.5	66.34	70	75.13	81.78
Heart	740	804.5	840	833	978.3
Kidneys	278.4	302.7	310	322.5	366.4
Liver	1,489	1,621	1,800	1,977	2,206
Lungs	1,068	1,162	1,200	1,344	1,502
Pancreas	127.5	138.2	140	144	161
Prostate	14.94	16.32	17	18	19.49
Salivary glands	76.76	82.63	85	88.11	92.22
Skeleton	8,289	8,990	10,500	10,781	11,800
Spleen	112.3	121.5	150	172	196.1
Testes	30.56	33.16	35	37.28	39.73
Thymus	21.68	23.3	25	26.53	27.76
Thyroid	18.42	19.99	20	20.54	21.04
Urinary bladder	45.05	48.63	50	53.72	59.02
Total body	63,560	69,170	73,000	76,790	91,720