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06 September 2008

Answer to Question #2410 Submitted to "Ask the Experts"

Category: Radiation Effects — Low-Dose Effects

The following question was answered by an expert in the appropriate field:

The Health Physics Society Position Statement regarding radiation risk states: "Epidemiological studies have not demonstrated adverse health effects in individuals exposed to small doses (less than 10 rem) delivered in a period of years." What are the health risks to an individual who has been exposed to 15-20 rem?

Some epidemiological studies suggest an increased risk of cancer in this dose range. However, when data from all studies are evaluated, results have not been consistent. This suggests that risks in the 15-20 rem dose range are very small and difficult to measure. Perhaps the most convincing evidence of health risks in this dose range are epidemiological studies of thyroid cancer in children exposed to radioactive iodine. Above 10 rem there appears to be a significant risk of thyroid cancer due to radioiodine exposure in children 15 years of age and younger.

Kenneth L. Mossman, PhD

Answer posted on 9 April 2003. The information and material posted on this Web site is intended as general reference information only. Specific facts and circumstances may alter the concepts and applications of materials and information described herein. The information provided is not a substitute for professional advice and should not be relied upon in the absence of such professional advice specific to whatever facts and circumstances are presented in any given situation. Answers are correct at the time they are posted on the Web site. Be advised that over time, some requirements could change, new data could be made available, or Internet links could change. For answers that have been posted for several months or longer, please check the current status of the posted information prior to using the responses for specific applications.