Radiation Dose Estimates for Co-60 Vitamin B-12 (Cyanocobalamin)

---

	Estimated Radiation Dose (mGy/MBq)
	No Flushing Dose		With Flushing Dose
ORGAN	Normals	Pernicious Anemia	Normals	Pernicious Anemia
Adrenals	1.7E+02	2.2E+01	1.1E+02	1.5E+01
Brain	2.0E+01	2.5E+00	1.3E+01	1.6E+00
Breasts	4.5E+01	5.8E+00	3.0E+01	3.9E+00
Gallbladder Wall	2.9E+02	3.8E+01	2.0E+02	2.6E+01
LLI Wall	3.6E+01	1.4E+01	2.5E+01	1.2E+01
Small Intestine	6.6E+01	1.0E+01	4.4E+01	7.7E+00
Stomach	7.2E+01	9.8E+00	4.8E+01	6.8E+00
ULI Wall	9.1E+01	1.6E+01	6.1E+01	1.2E+01
Heart Wall	1.0E+02	1.3E+01	6.8E+01	8.8E+00
Kidneys	1.2E+02	1.5E+01	8.0E+01	1.1E+01
Liver	8.2E+02	1.0E+02	5.5E+02	7.1E+01
Lungs	8.6E+01	1.1E+01	5.7E+01	7.3E+00
Muscle	4.8E+01	6.4E+00	3.2E+01	4.3E+00
Ovaries	4.5E+01	7.9E+00	3.0E+01	5.9E+00
Pancreas	1.4E+02	1.8E+01	9.2E+01	1.2E+01
Red Marrow	5.5E+01	7.4E+00	3.7E+01	5.1E+00
Bone Surfaces	4.6E+01	6.1E+00	3.1E+01	4.1E+00
Skin	3.3E+01	4.3E+00	2.2E+01	2.9E+00
Spleen	5.2E+01	6.8E+00	3.5E+01	4.6E+00
Testes	2.4E+01	3.3E+00	1.6E+01	2.2E+00
Thymus	4.8E+01	6.1E+00	3.2E+01	4.1E+00
Thyroid	2.8E+01	3.6E+00	1.9E+01	2.4E+00
Urinary Bladder Wall	3.5E+01	5.2E+00	2.2E+01	3.4E+00
Uterus	4.3E+01	6.4E+00	2.9E+01	4.6E+00
Effective Dose Equivalent	1.3E+02	1.7E+01	8.7E+01	1.2E+01

Estimate calculated using phantom of Cristy & Eckerman (Report ORNL/TM-8381/V1 & V7)