title: Radioactive contamination of contact lenses during radioiodine therapy.
abstract: Although the secretion of radioiodine in tears is not unexpected, there are only few investigations in that field. We report the measurement of 131I in disposable contact lenses for daily use during radioiodine treatment. After administration of 740 MBq 131I, all contact lenses of a 59-year-old female used the day before and 5 days after radioiodine therapy were collected and measured in a gamma counter. Activities of 124 Bq (right) and 139 Bq (left) were measured in the contact lenses used during the first day after administration of radioiodine. The activity in the contact lenses of the following days was significantly lower. An initial dose rate of approximately 0.31 microSv x h(-1) was caused by the radioactivity resulting in a total dose of 13 microSv to the patient's eye lens. That dose is negligible compared to the dose caused by the incorporated radioactivity.
authors.affiliation: Department of Nuclear Medicine, University of Vienna, Austria. georg.zettinig@akh-wien.ac.at
authors.forename: G
authors.initials: G
authors.lastname: Zettinig
authors.forename: G
authors.initials: G
authors.lastname: Karanikas
authors.forename: G
authors.initials: G
authors.lastname: Hanselmayer
authors.forename: E
authors.initials: E
authors.lastname: Havlik
authors.forename: R
authors.initials: R
authors.lastname: Dudczak
mesh_terms: D003263:Contact Lenses, Hydrophilic / Q000009:adverse effects*; D005260:Female; D006044:Goiter, Nodular / Q000532:radiotherapy; D006801:Humans; D007457:Iodine Radioisotopes / Q000009:adverse effects* / Q000627:therapeutic use; D007765:Lacrimal Apparatus / Q000378:metabolism; D008875:Middle Aged; D011829:Radiation Dosage; D019275:Radiopharmaceuticals / Q000009:adverse effects* / Q000627:therapeutic use
chemical_list: D007457:Iodine Radioisotopes; D019275:Radiopharmaceuticals