[ RadSafe ] Myth or Fact? (Dental dose)

[Otto Raabe]

I
August 29, 2006

Trying to follow this thread I conclude that the best information on 
effective dose from a single dental radiograph is somewhat as follows:

>Entrance skin  4.71 mGy
>Thyroid 0.0215 mGy

The ICRP tissue weighting factor for the thyroid is 0.05 so that the 
effective dose is 0.05 x 0.0215 mGy = 0.001075 mGy = 0.1 mrem.

Therefore, the average normal annual exposure of Americans to ionizing 
radiation from natural and human sources is equivalent to 3600 dental X-rays.

OItto


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Prof. Otto G. Raabe, Ph.D., CHP
Center for Health & the Environment
University of California
One Shields Avenue
Davis, CA 95616
E-Mail: ograabe at ucdavis.edu
Phone: (530) 752-7754   FAX: (530) 758-6140
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