TABLE 1

Selected Reference Organ Masses (g) for Pediatric/Adult Phantom Series

	Newborn		1-y-old		5-y-old		10-y-old		15-y-old		Adult
Organ/Tissue	Female	Male	Female	Male	Female	Male	Female	Male	Female	Male	Female	Male
Adrenals	6	6	4	4	5	5	7	7	9	10	13	14
Brain	380	380	950	950	1,180	1,310	1,220	1,400	1,300	1,420	1,300	1,450
Breasts	0	0	0	0	0	0	0	0	250	15	500	25
Esophagus	2	2	5	5	10	10	18	18	30	30	35	40
Eyes	6	6	7	7	11	11	12	12	13	13	15	15
Gallbladder wall	0.5	0.5	1.4	1.4	2.6	2.6	4.4	4.4	7.3	7.7	8	10
Left colon	7	7	20	20	49	49	85	85	122	122	145	150
Small intestine	30	30	85	85	220	220	370	370	520	520	600	650
Stomach wall	7	7	20	20	50	50	85	85	120	120	140	150
Right colon	7	7	20	20	49	49	85	85	122	122	145	150
Heart wall	20	20	50	50	85	85	140	140	220	230	250	330
Kidneys	25	25	70	70	110	110	180	180	240	250	275	310
Liver	130	130	330	330	570	570	830	830	1,300	1,300	1,400	1,800
Lungs	60	60	150	150	300	300	500	500	750	900	950	1,200
Muscle	800	800	1,900	1,900	5,600	5,600	11,000	11,000	17,000	24,000	17,500	29,000
Ovaries	0.3	0	0.8	0	2	0	3.5	0	6	0	11	0
Pancreas	6	6	20	20	35	35	60	60	100	110	120	140
Prostate	0	0.8	0	1	0	1.2	0	1.6	0	4.3	0	17
Rectum	3	3	10	10	22	22	40	40	56	56	70	70
Salivary glands	6	6	24	24	34	34	44	44	65	68	70	85
Red marrow	50	50	150	150	340	340	630	630	1,000	1,080	900	1,170
Bone surfaces	4.21	4.21	13.7	13.7	33	33	56	56	92	92	120	120
Spleen	9.5	9.5	29	29	50	50	80	80	130	130	130	150
Testes	0	0.85	0	1.5	0	1.7	0	2	0	16	0	35
Thymus	13	13	30	30	30	30	35	40	30	35	20	25
Thyroid	1.3	1.3	1.8	1.8	3.4	3.4	7.9	7.9	12	12	17	20
Urinary bladder wall	4	4	9	9	16	16	25	25	35	40	40	50
Uterus	4	0	1.5	0	3	0	4	0	30	0	80	0
Total body	3,500	3,500	10,000	10,000	19,000	19,000	32,000	32,000	53,000	56,000	60,000	73,000