Radiation exposure of the families of outpatients treated with radioiodine (iodine-131) for hyperthyroidism

Barrington, Sally F. and O'Doherty, Michael J. and Kettle, Andrew G. and Thomson, William H. and Mountford, Peter J. and Burrell, David N. and Farrell, Robert J. and Batchelor, Stanley and Seed, Paul T. and Harding, L.Keith (1999) Radiation exposure of the families of outpatients treated with radioiodine (iodine-131) for hyperthyroidism. European Journal of Nuclear Medicine, 26 (7). pp. 686-692. ISSN 0340-6997. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Patients who receive radioiodine (iodine-131) treatment for hyperthyroidism (195-800 MBq) emit radiation and represent a potential hazard to other individuals. Critical groups amongst the public are fellow travellers on the patient's journey home from hospital and members of the patient's family, particularly young children. The dose which members of the public are allowed to receive as a result of a patient's treatment has been reduced in Europe following recently revised recommendations from ICRP. The annual public dose limit is 1 mSv, though adult members of the patient's family are allowed to receive higher doses, with the proviso that a limit of 5 mSv should not be exceeded over 5 years. Unless the doses received during out-patient administration of radioiodine can be demonstrated to comply with these new limits, hospitalisation of patients will be necessary. The radiation doses received by family members (35 adults and 87 children) of patients created with radioiodine at five UK hospitals were measured using thermoluminescent dosimeters mounted in wrist bands. Families were given advice (according to current practice) from their treatment centre about limiting close contact with the patient for a period of time after treatment. Doses measured over 3-6 weeks were adjusted to give an estimate of values which might have been expected if the dosimeters had been worn indefinitely. Thirty-five passengers accompanying patients home after treatment also recorded the dose received during the journey using electronic (digital) personal dosimeters. For the "adjusted" doses to infinity, 97% of adults complied with a 5-mSv dose limit (range:0.2-5.8 mSv) and 89% of children with a 1-mSv limit (range: 0.2-7.2 mSv). However 6 of 17 children aged 3 years or less had an adjusted dose which exceeded this 1 mSv limit. The dose received by adults during travel was small in comparison with the total dose received. The median travel dose was 0.03 mSv for 1 h travel (range: 2 mu Sv-0.52 mSv for 1 h of travel time). These data suggest that hyperthyroid patients can continue to be treated with radioiodine on an out-patient basis, if given appropriate radiation protection advice. However, particular consideration needs to be given to children aged 3 years or younger. Admission to hospital is not warranted on radiation protection grounds.

Item Type: Article
Uncontrolled keywords: Radiation protection – radioiodine – thyrotoxicosis
Subjects: R Medicine
Divisions: Faculties > Science Technology and Medical Studies > Kent Institute of Medicine and Health Sciences (KIMHS)
Depositing User: M. Nasiriavanaki
Date Deposited: 23 Jul 2009 06:51
Last Modified: 10 Jun 2014 09:21
Resource URI: https://kar.kent.ac.uk/id/eprint/17054 (The current URI for this page, for reference purposes)
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