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Radiation Dose Calculations for Inhalation of Tc-99m Sulfur Colloid Radioaerosol

University of Western Ontario, London, Ontario, Canada

Correspondence: For reprints contact: Frank S. Prato, Nuclear Medicine Dept., St. Joseph's Hospital, London, Ontario, Canada N6A 4V2.

ABSTRACT

The radiation dose to the lung from the administration of Tc-99m sulfur colloid aerosol (for ventilation investigations) has been calculated. The dose to the ciliated airway epithelium varies between 0.34 to 2.5 rads, compared with 0.31 rads to the lung parenchyma. The calculation was normalized to a total of 1 mCi of Tc-99m deposited in the lung.

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