Radiation Dose Estimates for Oral Administration of Tc-99m

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	Estimated Radiation Dose (mGy/MBq)
ORGAN	mGy/MBq	rad/mCi
Adrenals	2.8E-03	1.0E-02
Brain	2.3E-06	8.7E-06
Breasts	3.5E-04	1.3E-03
Gallbladder Wall	1.4E-02	5.1E-02
LLI Wall	8.0E-02	3.0E-01
Small Intestine	5.8E-02	2.1E-01
Stomach	3.4E-02	1.3E-01
ULI Wall	1.2E-01	4.3E-01
Heart Wall	1.3E-03	4.8E-03
Kidneys	5.6E-03	2.1E-02
Liver	3.7E-03	1.4E-02
Lungs	7.0E-04	2.6E-03
Muscle	3.2E-03	1.2E-02
Ovaries	2.4E-02	9.0E-02
Pancreas	7.4E-03	2.7E-02
Red Marrow	4.6E-03	1.7E-02
Bone Surfaces	4.1E-03	1.5E-02
Skin	9.3E-04	3.5E-03
Spleen	5.0E-03	1.8E-02
Testes	1.2E-03	4.6E-03
Thymus	2.3E-04	8.6E-04
Thyroid	2.3E-05	8.5E-05
Urinary Bladder Wall	6.6E-03	2.4E-02
Uterus	1.5E-02	5.6E-02
Effective Dose Equivalent	2.5E-02 mSv/MBq	9.3E-02 rem/mCi

Activity follows GI tract kinetics as in ICRP 30, with no absorption from small intestine (no human or animal data used).

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