Radiation Dose Estimates for Tc-99m Glucoheptonate

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	Estimated Radiation Dose
ORGAN	mGy/MBq	rad/mCi
Adrenals	4.1E-03	1.5E-02
Brain	1.2E-03	4.6E-03
Breasts	1.1E-03	4.1E-03
Gallbladder Wall	3.4E-03	1.3E-02
LLI Wall	5.6E-03	2.1E-02
Small Intestine	3.9E-03	1.4E-02
Stomach	2.5E-03	9.4E-03
ULI Wall	3.4E-03	1.3E-02
Heart Wall	1.9E-03	7.1E-03
Kidneys	4.4E-02	1.6E-01
Liver	3.2E-03	1.2E-02
Lungs	1.7E-03	6.2E-03
Muscle	2.5E-03	9.1E-03
Ovaries	5.5E-03	2.0E-02
Pancreas	3.5E-03	1.3E-02
Red Marrow	2.6E-03	9.5E-03
Bone Surfaces	3.7E-03	1.4E-02
Skin	1.3E-03	4.8E-03
Spleen	3.7E-03	1.4E-02
Testes	3.7E-03	1.4E-02
Thymus	1.5E-03	5.6E-03
Thyroid	1.5E-03	5.5E-03
Urinary Bladder Wall	7.4E-02	2.7E-01
Uterus	9.9E-03	3.6E-02
Effective Dose Equivalent	1.0E-02 mSv/MBq	3.8E-02 rem/mCi

Based on data gathered in humans by Arnold et al., J Nucl Med 16:357-367, 1975. Assumed distribution and retention:

Kidneys 14.6% uptake Tb = 0.75 hr elimination Tb = 24 hr
Liver 1.5% Tb = ñ
Total Body 35% Tb = 89 hr 30% Tb = 2.04 hr 35% Tb = 0.333 hr
All clearance through urinary bladder, 4.8 hour bladder voiding interval.

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