Re: EDE from FDG

[Karin Gordon <kgordon@cc.UManitoba.CA>]

Look at the 1987 ICRP Publication 53 "Radiation Dose to Patients from
Radiopharmaceuticals"  for detailed organ and tissue doses (mGy/MBq),
which are still accurate.  Ignore the effective dose  quoted in ICRP 53
because it was published using the old tissue weighting factors prior to
ICRP-60.    ICRP-62 contains an addendum to Publication 53, updating the
effective dose (mSv/MBq) for radiopharmaceuticals, taking the new tissue
wieghting factors into account.ICRP-62 states the effective dose from
Tc-99m phosphates and phosphonates (used for bone imaging) to be 5.8E-03
mSv/MBq.  The standard amount of activity given for a bone scan is 740
MBq (20 mCi), so your effective dose from the procedure is 4.29 mSv (429
mrem).

By the way, the old ICRP-53 effective dose was higher (8.0E-03 mSv/MBq),
which calculated out to 5.92 mSv, giving a difference of  1.63 mSv,
depending when you underwent the procedure!!  Ain't science grand  ;-)

Karin Gordon
Radiation Safety Officer
Health Sciences Centre
Winnipeg, Manitoba
KGordon@cc.UManitoba.ca