Re: FW: question concerning stress tests

[bobcherry@cox.net]

Of course, you could take this stress test and not get any radiation dose at all:



http://www.freep.com/jobspage/club/stress.htm





> 

> From: "Careway, Harold A. (GE Energy)" <Harold.Careway@gene.GE.com>

> Date: 2005/01/12 Wed AM 11:30:19 EST

> To: "Radsafe (E-mail)" <radsafe@list.vanderbilt.edu>

> Subject: FW: question concerning stress tests

> 

> Phil sent:

>  

> Exposures from nuclear stress tests can be considerable, at least to those

> of us who have to explain and justify every last millirem to regulators and

> activists.  

>  

> Several years ago I had a stress test and made some post treatment

> measurements with a Bicron MicroR meter. 

>  

> Injections of 30 mCi of Tc-99m and 4 mCi of Tl-201 result in a cumulative

> dose of ~600 mrem.  Seven (7) hours after treatment, the exposure rate was

> 17 mR/hr in contact with the stomach and 20 microR/hr (twice background) at

> 30 feet.  Exposure rate at stomach level after 2 days was ~2 mR/hr, and

> after 7 days was ~0.5 mR/hr.   After 3 weeks, exposure rates were

> indistinquishable from background.  

>  

> Yes, at those levels, a lot of patients are going to be setting of the

> increasing number of post 9/11 radiation monitors in airports, borders, etc.

>  

> See http://www.philrutherford.com/Stress_Test_2003.pdf

> <http://www.philrutherford.com/Stress_Test_2003.pdf>  for charts of exposure

> vs. distance and time.

>  

> Interestingly enough, when I asked the nuclear technician who administered

> the radiopharmaceuticals, how much exposure I would receive, he said "Oh,

> about the same as a chest X-ray (~10 mrem)."  I do not know whether that was

> simple ignorance or deliberate misinformation.

>  

> Phil

>  

> ----------------------------------------------------------------------------

> -----

>  

> I had the same experience when I went for my Cardolite test - the technician

> was able to tell me the activity dose I was receiving (30 mCi of Tc-99m) but

> not my whole body or effective dose in mR or mSv.  It was like he never

> heard of such a thing and really made me angry.   Latter I estimated that

> between the two doses I received (1PM in the afternoon and a second dose at

> 8AM the next morning) I picked up somewhere between 1600-1800 mR integrated.

> 

>  

> I continued to register above background on my Xetex 308A until three days

> after the procedure and the first day I could set the detector off from 15

> feet outside my office, what fun.

>  

>  

> Hal Careway

>  

>  

> 

> 



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