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Uptake of 131I in Households of Thyroid Cancer Patients

North, David L.*

doi: 10.1097/HP.0b013e31828326ae

Fifty persons and pets living with thyroid cancer patients who were treated with large administered activities of 131I have been surveyed to ascertain their uptake of radioiodine from the domestic environment. All patients had been hospitalized for one night after the therapeutic administration, and the thyroids of the cohabitants were assayed 3–10 d after the patients returned home. Seven of the assays were positive for 131I in the thyroid gland. The transmitted quantities absorbed by the cohabitants were all less than 10−4 of the patients’ burdens at discharge.

*Alpert Medical School, Brown University, and Department of Medical Physics, Rhode Island Hospital, Providence, RI 02903.

The author declares no conflicts of interest.

For correspondence contact: David L. North, Department of Medical Physics, Main Bldg. Rm 317, Rhode Island Hospital, 593 Eddy Street, Providence, RI 02903, or email at

(Manuscript accepted 13 December 2012)

©2013Health Physics Society