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18 March 2010

Answer to Question #927 Submitted to "Ask the Experts"

Category: Radiation Workers

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

If a radiologic technologist is issued only one film badge, and it is designated as a whole-body badge, where should it be worn when he/she is working in a fluoroscopy room?

There is no ideal place to wear a single personal radiation monitor. Where it is worn depends more on state law/regulations than anything else. If only one badge is issued, Tennessee (and I think most states) requires that it be worn at collar level outside of the leaded apron. This will give an estimate of dose to optic lens and thyroid and an overestimate of whole-body dose. A better estimate of whole-body dose would come from a monitor worn at waist level under the leaded apron. But this would underestimate the dose to lens and thyroid. Remember that occupational dose limits include a whole-body dose (for stochastic effects) plus specific dose limits for lens, hands, feet, etc. (for deterministic effects).

Julian Gibbs, DDS, PhD

Answer posted on 18 May 2001. 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.