Re[2]: I-131 Thyroid Uptake

["Jim Dunlap" <jim.dunlap@guardian.brooks.af.mil>]

     Could be several things going on here.  I attended a medical meeting 
     in which the speaker pointed out that occasionally thyroid tissue is 
     located in the body other than where the gland normally is.  Could be 
     a diseased gland (cancer, hyperthroidism, hypothyroidism, etc.)  It's 
     best to take a thyroid count with a NaI detector.


______________________________ Reply Separator _________________________________
Subject: Re: I-131 Thyroid Uptake
Author:  radsafe@romulus.ehs.uiuc.edu at guardian
Date:    1/27/99 3:05 PM


At 12:09 PM 1/27/99 -0600, you wrote:
>Does anyone have references to suggest for answers to the following questions:
>
>What is the typical percent of a iodine intake (we happen to be concerned
with I-131) that will be taken into the thyroid gland?  My 1972 copy of
Shapiro, "Radiation Protection" says 30%, but there is some indication that
it may be as low as 3% (at least for some individuals) according to other
sources.
>
>So, is the answer a range, say about 3 to 30%?  Does the pathway make a
difference, e.g. nuclear medicine injection vs. reactor release and
subsequent accidental inhalation?
>
>Thanks,
>Mike McCarty
>Health Physicist/Emergency Planner
>mccartmj@state.mi.us
>
>Michigan Department of Environmental Quality
>Drinking Water and Radiological Protection Division
>Radiological Protection Section
>Nuclear Facilities Unit
>   phone:  517-335-9414
>     fax:  517-335-8706
>
>mailing address:
>     Michigan Department of Environmental Quality
>     Drinking Water and Radiological Protection Division
>     3423 North Martin Luther King Jr. Blvd
>     P.O. Box 30630
>     Lansing, MI 48909-8130
>
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>The ordinary thyroid radioiodine uptake in normal adults is 10-25%;
occasionally it is as low as 5% or as high as 30%, but not often.  

Carol S. Marcus, Ph.D., M.D.
<csmarcus@ucla.edu>

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