TABLE 2

β-Only S Factors (Gy/Bq s) for 5 Radionuclides

Isotope	Target organ	Source organ
Isotope	Target organ			Liver	Right kidney	Left kidney	Spleen
¹³¹I	Liver	2.0E−11	1.1E−13	0	0
	Right kidney	1.0E−13	1.7E−10	0	0
	Left kidney	0	0	2.0E−10	5.2E−14
	Spleen	0	0	3.6E−14	4.2E−10
¹⁵³Sm	Liver	2.7E−11	1.6E−13	0	0
	Right kidney	1.5E−13	2.2E−10	0	0
	Left kidney	0	0	2.7E−10	1.7E−13
	Spleen	0	0	1.4E−13	5.7E−10
³²P	Liver	5.6E−11	1.8E−12	0	7.6E−15
	Right kidney	1.7E−12	4.0E−10	2.3E−13	0
	Left kidney	0	2.1E−13	4.7E−10	1.2E−11
	Spleen	7.0E−15	0	1.2E−11	7.6E−10
¹⁸⁸Re	Liver	6.4E−11	2.2E−12	7.3E−16	2.1E−14
	Right kidney	2.2E−12	4.5E−10	7.0E−13	0
	Left kidney	5.9E−16	6.6E−13	5.2E−10	1.6E−11
	Spleen	2.0E−14	0	1.6E−11	8.6E−10
⁹⁰Y	Liver	6.8E−11	3.2E−12	8.4E−15	5.7E−14
	Right kidney	3.2E−12	4.5E−10	1.9E−12	0
	Left kidney	7.4E−15	1.8E−12	5.1E−10	2.5E−11
	Spleen	5.4E−14	0	2.5E−11	8.1E−10

Values less than 1.00E−16 were set to zero.