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21 November 2009

Answer to Question #1263 Submitted to "Ask the Experts"

Category: Radiation Workers

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

I'm working on an SOP covering the occupational monitoring restriction of employees who have undergone medical radiopharmaceutical treatment. It seems that most facilities have simply gone with a multiple of the radiological half-life—which is unsatisfactory for several applications. I have found Web sites listing mrem/µCi for numerous radioisotopes by application, but what I really need is a reference which lists whole-body effective half-life by radioisotope by mode of introduction. Is there something like that out there?

I am currently running a Web site with a variety of information on dosimetry. On the page under "Diagnostic Applications" you can download an Excel spreadsheet that has dose estimates for a number of radiopharmaceuticals but, also, there is a "Kinetic Models" tab that gives some standardized kinetic models for these compounds. Most of these data came from ICRP Publications 53 and 80, which I would recommend for your reading shelf on this subject. They list many of the original references for the data and give far more detail than you can list in a spreadsheet.

Michael G. Stabin, PhD, CHP

Answer posted on 10 October 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.