RE: Dose rate of a patient administered with 10mCi FDG-F18

["Jacobus, John (OD/ORS)" <jacobusj@ors.od.nih.gov>]

You may want to see Benatar, N.A., Cronin, B.F., and O'Dohenty, M.J.,

"Radiation dose rates from patients undergoing PET:  implications for

technologists and waiting rooms," European Journal of Nuclear Medicine, Vol

25, No. 5, May 2000.  



For 1 meter distances, the mean dose rates/MBq (uSv/hr) at one meter are

listed as 0.16 at mid-trunk, 0.11 at head, 0.03 at feet.  This is for 35

patients.



-- John 

John Jacobus, MS

Certified Health Physicist 

3050 Traymore Lane

Bowie, MD  20715-2024



E-mail:  jenday1@email.msn.com (H)      



-----Original Message-----

From: LAM HOI CHING, JOHN [mailto:lamhc@HKUSUA.HKU.HK]

Sent: Saturday, July 28, 2001 11:15 AM

To: radsafe@list.vanderbilt.edu

Subject: Dose rate of a patient administered with 10mCi FDG-F18





Radsafers,

   I would like to know the dose rate at 1m from a patient administered

with 10mCi FDG-F18. I have specific gamma rate constant calculation for F18

in air which gives about 60uSv/hr in air. But I think that patient body

will have effective absorption and attenuation which may reduce that by

one-half but one-third? However I don't have any real practical data of

that.

   Thank you for the responses.









John Lam, Physicist, Eastern Hospital



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