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RE: Extremity Doses for NM
Good, informative post, Diane.
I've not watched our PET techs. Do they use any kind of syringe shields or
remote administration techniques? It's pretty hard to do anything with those
511 annihilation photons.
/R
Oh: precedence. I usually put Ph.D. after CHP, thinking it's of higher
precedence and higher precedence goes at the end. Lance does M.D., Ph.D.
Interestingly, Ph.D. is of greater precedence than M.D. How about that? So,
when folks say only "true docs" (meaning physicians) should be called doctor, I
pass that info on to them.
> -----Original Message-----
> From: Case, Diane (OD)
> Sent: Monday, November 15, 1999 10:20 AM
> To: Multiple recipients of list
> Subject: Extremity Doses for NM
>
>
> See NCRP Report No. 124. "Sources and Magnitude of
> Occupational Exposures From
> Nuclear Medicine Procedures."
>
> Three year's worth of data shows me that the extremity doses
> of Nuclear Medicine
> Technologists at our facility hover around
> 250-350 mrem per year. There is of course, that one person
> who does more work
> than others, or is the first person in the morning to do
> QC/QA activities, or
> may fill in for the radiopharmacist. That person received
> the highest annual
> dose: 600-650 mrem. Whole body doses are either equal or
> less except in rare
> cases.
>
> Regarding whole body doses: "Numerous groups have estimated
> that medical
> radiation workers in the United States receive annual
> effective doses between
> 2.5 and 5 mSv. Doses will vary with the individual and the
> task." (pp. 9-10).
> The 2.5 - 5 mSv is definitely on the mark for us (we are
> about 2.5-4 mSv).
>
> Of course, there are so many factors which contribute to
> individual dose,
> especially to the extremities: the radionuclide, the
> activity, technologist's
> injection aptitude, how far away the work station (computers,
> etc.)is to the
> patient, how long the technologist stays in the room, level
> of patient handling
> needs, etc.
>
> Positron Emission Tomography (PET) technologists are quite
> different. They
> receive an average of 4-5 rem to their fingers annually, with
> an occasional 6
> rem, and about 250-400 mrem to the whole body annually. Of
> course we perform
> exposure investigations at 10% and at 30% of the NRC limits
> (even though not NRC
> regulated material). We find these doses are generally
> commensurate with the
> technologist's duties. And - these PET technologists are
> incredibly talented.
>
> Diane Case, Ph.D, CHP
>
>
>
> Rob Kraken stated the following:
>
> > You might check with a good dosimetry vendor like ICN
> pharmaceuticlas in Costa Mesa,CA @ 1-714-545-0100 ask for
> Sandy Perle-asst technical director. I'm sure he could provide
> common doses received from ring dosimeters etc.. RobK
> honolulu@u1st.com<
>
> Engelbretson, David A. wrote:
>
> > Would anyone know of some good resources that describe dose
> > estimates to hands and fingers from handling nuclear medicine
> > radiopharmaceuticals?
>
> > Thank you for your help.
> >
> > David Engelbretson, MS
> > Asst. RSO
> > Methodist Hospital
> > Houston, Texas
>
> -----------------------
> Sandy Perle
> Technical Director
> ICN Dosimetry Division
> 3300 Hyland Avenue
> Costa Mesa, CA 92626
> (800) 548-5100 x2306
> (714) 668-3149 Fax
>
> sperle@icnpharm.com
> sandyfl@earthlink.net
>
>
>
> Diane L. Case, Ph.D., CHP
> Senior Health Physicist
> NIH Radiation Safety Branch
> Building 21
> Bethesda, MD 20892-6780
>
> Phone: (301) 496-5774
> Fax: (301) 496-3544
> Email: dcase@nih.gov
>
> **************************************************************
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