Re: medical misadministration to child

["Michael G. Stabin" <michael.g.stabin@vanderbilt.edu>]

From: "John Jacobus" <crispy_bird@YAHOO.COM>

> By the way, a good reference for determinating radionuclide doses to

children receiving medical scans can be found at

http://www.orau.gov/ehsd/pedose.doc  For a 10 year old child, which is close

to a 9 year old, the thyroid dose 880 mSv/MBq of I-131.  The effective dose

equivalent is 27 mSv/MBq.  For a dose of 400 uCi or 14.8 MBq, the thyroid

dose is 13037 mSv or 130.4 rem, and the EDE is 3.99 rem.





I agree with John's philosophical points, but in addition to my earlier

point about the questionable nature of the use of dose equivalent values at

these levels, I assert that the effective dose is absolutely not meaningful

in this situation. Cumulative absorbed dose (Gy) to the thyroid is the

quantity of interest.



Mike





Michael G. Stabin, PhD, CHP

Assistant Professor of Radiology and Radiological Sciences

Department of Radiology and Radiological Sciences

Vanderbilt University

1161 21st Avenue South

Nashville, TN 37232-2675

Phone (615) 343-0068

Fax   (615) 322-3764

Pager (615) 835-5153

e-mail     michael.g.stabin@vanderbilt.edu

internet   www.doseinfo-radar.com







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