Re[2]: EDE from FDG

[Ruth Weiner <rfweine@sandia.gov>]

     I recently had a bone scan and was injected with Tc-99.  Using my 
     handy Pink Book (now a Blue Book) I calculated the EDE to be about 60 
     mrem.
     
     Clearly only my own opinion.
     
     Ruth Weiner
     rfweine@sandia.gov


______________________________ Reply Separator _________________________________
Subject: Re: EDE from FDG
Author:  alstonc@odrge.odr.georgetown.edu at hubsmtp
Date:    5/13/98 6:41 AM


Scott
     
It's not, however, considerably greater than the EDE from other nuc med 
diagnostics, but, in fact, readily comparable. Somehow, it seems intuitively 
"right" that it takes a bigger dose to get physiological data, than to get 
anatomical data, doesn't it?
     
chris alston
     
At 10:41  05/12/98 -1000, you wrote:
>I was recently asked to compare the dose received from a PET exam to a 
>chest x-ray.  The best reference I found was in the Journal fo Nuclear 
>Medicine 1991; 32:699-706.   In Table 6, the EDE for an intravenous 
>injection of FDG is stated as 2.4E-2 mGy/MBq.
>
>That would be 0.09 rad/mCi in nostalgic units.  Considering a typical PET 
>study may require 10 mCi of FDG, that means the EDE would be 0.9 rad,
>or 900 mrem.
>
>I was very surprised by the magnitude of this value.  Table 3.27 of NCRP 
>100 states the EDE of a chest exam to be 0.08 mSv, or 8 mrem.  The EDE 
>from a CT exam is stated as 1.11 mSv, or 111 mrem.    The EDE from a 
>barium enema exam is 4.06 mSv, 0r 406 mrem.
>
>As you can see, the EDE from a FDG PET exam is considerably greater 
>than other diagnostic exams.  This was news to me, so I thought it might 
>be interesting to share with you.
>
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