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EDE from Bone Scan
NUREG/CR-6345 gives the EDE from a 20 mCi dose of Tc-99m MDP as 440 mrem (22
mrem/mCi). What are the "Pink" and "Blue" Books?
chris alston
>On Wed, 13 May 1998, Ruth Weiner wrote:
>
>>
>> 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.
>> >
>> > *****
>> >Frequently Asked Questions (FAQ) for Medphys at:
>> >http://www.mindspring.com/~sherouse/MPFAQ.html
>> >
>> >
>> >
>>
>