Exposure of critical groups to nuclear medicine patients |
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| Affiliation: | 1. Division of Medical Physics, North Staffordshire Hospital (Royal Infirmary), Princes Road, Hartshill, Stoke-on-Trent, Staffordshire ST4 7LN, UK;2. Department of Nuclear Medicine, Kent and Canterbury Hospital, Ethelbert Road, Canterbury, Kent CT1 3NG, UK;1. Department of Radiation Oncology, University of Virginia School of Medicine, Charlottesville, VA;2. Division of Biostatistics, Department of Pharmacology & Experimental Therapeutics, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA;3. Division of Gynecology Oncology, Department of Obstetrics & Gynecology, University of Virginia School of Medicine, Charlottesville, VA;4. Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD;1. Harshamitra Super-Specialty Cancer Centre and Research Institute, Trichy, Tamilnadu, India;2. Sundaram Hospital, Trichy, Tamilnadu, India;3. RPS Hospitals, Chennai, Tamilnadu, India;1. Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark;2. Department of Nuclear Medicine & PET Centre, Aarhus University Hospital, Aarhus, Denmark |
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| Abstract: | ![]()
When a radiopharmaceutical has been administered to a patient, assessment of the risk to critical groups from emitted photon radiation is by measurement of the integral dose received by an individual, or by measurements of the dose rate external to the patient coupled with appropriate occupancy factors. Estimations have been made from the available data of the dose to critical groups exposed to patients who have undergone diagnostic or therapeutic procedures. These dose estimations can be used to assess the impact of the proposed changes in statutory requirements, and to allow appropriate recommendations to be formulated. Two areas for consideration are that pregnant staff exposed to nuclear medicine patients will require an abdominal surface dose limit lower than 2 mSv to restrict their foetal dose to 1 mSv, and the current UK restrictions for the behaviour of patients who have undergone 131I treatment are either already adequate or can even be relaxed in order to restrict the exposure of members of the public to the proposed lower dose limits. Agreement is needed on the value (e.g. 95th percentile) from a study of the dose to a number of individuals which should serve as the basis for radiation protection recommendations. |
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