Radiation Dose Estimates for Intravenous Administration of
Tc-99m Sulfur Colloid in Normal Patients

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	Estimated Radiation Dose (mGy/MBq)
ORGAN	mGy/MBq	rad/mCi
Adrenals	1.3E-02	4.8E-02
Brain	2.7E-04	9.9E-04
Breasts	2.1E-03	7.7E-03
Gallbladder Wall	2.4E-02	8.7E-02
LLI Wall	9.6E-04	3.5E-03
Small Intestine	3.8E-03	1.4E-02
Stomach	5.9E-03	2.2E-02
ULI Wall	5.6E-03	2.1E-02
Heart Wall	6.9E-03	2.5E-02
Kidneys	9.6E-03	3.6E-02
Liver	8.6E-02	3.2E-01
Lungs	6.2E-03	2.3E-02
Muscle	2.5E-03	9.2E-03
Ovaries	1.6E-03	5.9E-03
Pancreas	1.3E-02	5.0E-02
Red Marrow	5.2E-03	1.9E-02
Bone Surfaces	5.4E-03	2.0E-02
Skin	1.2E-03	4.4E-03
Spleen	5.3E-02	2.0E-01
Testes	2.2E-04	8.2E-04
Thymus	1.9E-03	7.1E-03
Thyroid	5.1E-04	1.9E-03
Urinary Bladder Wall	6.3E-04	2.3E-03
Uterus	1.3E-03	5.0E-03
Effective Dose Equivalent	1.4E-02 mSv/MBq	5.0E-02 rem/mCi

Based on model of MIRD Dose Estimate Report No. 3 (data gathered in human subjects), J Nucl Med 16:108A-108B, 1975.

Estimate calculated using phantom of Cristy & Eckerman (Report ORNL/TM-8381/V1 & V7). Bone and marrow model of Eckerman (Aspects of dosimetry of radionuclides within the skeleton with particular emphasis on the active marrow, In Fourth International Radiopharmaceutical Dosimetry Symposium; A.T. Schlafke-Stelson and E. E. Watson eds. CONF-851113, Oak Ridge Associated Universities, Oak Ridge, TN 37831, 1986. pp 514-534.) used.