Radiation Dose Estimates for Kr-81m Injections

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	Estimated Radiation Dose (mGy/MBq)
ORGAN	mGy/MBq	rad/mCi
Adrenals	4.5E-06	1.7E-05
Brain	9.7E-08	3.6E-07
Breasts	4.5E-06	1.7E-05
Gallbladder Wall	1.7E-06	6.4E-06
LLI Wall	8.9E-08	3.3E-07
Small Intestine	3.0E-07	1.1E-06
Stomach	2.8E-06	1.0E-05
ULI Wall	4.3E-07	1.6E-06
Heart Wall	1.9E-04	7.1E-04
Kidneys	1.2E-06	4.4E-06
Liver	3.8E-06	1.4E-05
Lungs	5.1E-05	1.9E-04
Muscle	1.6E-06	6.0E-06
Ovaries	1.2E-07	4.4E-07
Pancreas	4.3E-06	1.6E-05
Red Marrow	2.1E-06	7.6E-06
Bone Surfaces	2.2E-06	8.3E-06
Skin	6.7E-07	2.5E-06
Spleen	2.4E-06	8.7E-06
Testes	1.4E-08	5.2E-08
Thymus	1.3E-05	5.0E-05
Thyroid	1.1E-06	4.0E-06
Urinary Bladder Wall	5.1E-08	1.9E-07
Uterus	1.1E-07	4.2E-07
Effective Dose Equivalent	2.0E-05 mSv/MBq	7.5E-05 rem/mCi

Residence times based on a model in which activity clears from the blood,
to the right heart, lungs, left heart, and back to blood, with 95% clearance
of blood from lungs on each pass. Half times for transport are 1 minute in
heart chambers, 5 minutes in lung, and 3 minutes in the body. (No patient or animal data used).

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