Re: Fwd: Oscillations in Thyroid I-131 levels

["Lorna Hubble (Bullerwell)" <ljb1@cornell.edu>]

Out of curiosity, I forwarded the individual who is in charge of the vet 
nuclear medicine here at Cornell.  Here is his reply.

Lorna:
This issue sounds like a distance and location dependent problem. I have 
found that our Bicron meter is very angle and location dependent. You can 
literally be one cm away from the surface of the thyroid gland and have 
readings that are an order of magnitude lower. If the readings are taken at 
any distance and not specifically over the thyroid gland then you will get 
all sort of fluctuations in readings. The other possibility is that the 
readings are taken with a full or empty urinary bladder - this will also 
change the activity readings thru the day. Overall, I think that this is a 
machine, location, distance or bladder issue. I seriously doubt the 
hypothesis presented on the listserve.
Ned

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Any statement above is 100% my responsibility.
Don't blame Cornell!
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Lorna Hubble (Bullerwell)		Phone:  (607) 255-8816
Radiological Safety Specialist	Fax:  (607) 255-8267
Cornell University			mailto:ljb1@cornell.edu
Department of Environmental Health and Safety
Laboratory and Radiation Safety Section
125 Humphreys Service Building,  Ithaca, NY  14853
http://www.ehs.cornell.edu/
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