[ RadSafe ] Dental X-ray Doses

[Otto G. Raabe]

At 08:07 AM 6/7/2011 Richard Hanson wrote:
>This is not my area of expertise, but the NCRP Report No. 160 has 
>the following information.
>The dose depends on whether you want the dose per image (5 uSv) or 
>dose per examination (90 uSv for 18 images).
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June 7, 2011

I am having trouble with this. I was looking for dose to irradiated 
tissue and possible exposure dose to the thyroid glands since they 
are the main target of interest.

A dose as small as 0.005 mSv per image seems to be unbelievable.

On this forum above Bryan Lemieux wrote "NCRP 145 gives effective 
doses for intraoral full mouth series and 5-10 mrem per series..." 
That's 0.05 to 0.1 mSv.

Don Parry above sent me 
to  http://www.michigan.gov/lara/0,1607,7-154-27417_35791_35798-46657--,00.html
That gave 100 mrem (1 mSv) or even much more per bite-wing.

Again, I repeat, my main interest is the unshielded thyroid, but the 
dose to the mouth is also of interest.

0.005 mSv must be some kind of whole body average or effective dose, 
each of which is misleading.

Otto



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Prof. Otto G. Raabe, Ph.D., CHP
Center for Health & the Environment
University of California
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E-Mail: ograabe at ucdavis.edu
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