Re: ? renal scan dose

["Lindsay Tremethick" <lindsay@gh.vic.gov.au>]

 Tc-99 could have an effect on the film badges 

The Health Physics and Radiological Health Handbook page 454 has some 
data on dose equivalent rate for adult patients but without knowing 
the admin dose I wouldn't know what numbers to quote



> From:          "John Zummo" <zummo@gene.COM>
> To:            Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
> Subject:       ? renal scan dose

> A PI just called to tell me that yesderday one of her lab workers had a
> Tc-99m renal scan at 9AM, and then came to work at 11AM.  She spent most
> of the day at the PC, about 3-4 feet away from the badge rack where the
> dosimeters for the lab are kept.  She herself is not a radiation worker.
> The PI reported that the person was "quite hot" by the GM meter.  She did
> not know what the administered dose was, but was now concerned about the
> badges.
> 
> My limited nuc med references show a typical dose of 20 mCi, with a post
> administration dose rate of 2 mrem/hour at 3 feet.  If this is correct,
> the badges should show less than 10 mrem.
> 
> Can any nuc med experts confirm this, or am I missing something?
> 
> Thanks in advance.
> 
> Regards,
> 
> John
> 
> John Zummo, RSO
> Genentech, Inc.
> (415) 225-2959
> (415) 225-5008 (fax)
> zummo@gene.com
> 
> 
Lindsay Tremethick
Radiation Oncology
Geelong Hospital
Geelong, Victoria, Australia