Re: The "right" answer

[John Jacobus <crispy_bird@YAHOO.COM>]

Ted, 

The skin is fairly radioresistant.  See Pages 325-327

in http://www.nap.edu/catalog/1224.html  Information

on thyroid cancers in this group is on pages 283-286



The tissue weighting factors are 0.01 for skin and

0.05 for the thyroid.



I do not understand your last paragraph.  How does

average doses presuppose the LNT? The dose to organs

is usually in dose equivalent values, not the

equivalent dose.



--- Ted de Castro <tdc@xrayted.com> wrote:

> Also - considering the output and energy of a Grenz

> Ray machine the skin

> dose was surely much higher.  I would assume the

> bulk of the cancers

> were probably skin cancers in the affected area -

> but I don't know this

> for sure - clarification would be appreciated.

> 

> Using average dose as meaning anything at all

> presupposes LNT to be

> correct.  Especially in SI units - which are risk

> based and have little

> meaning without LNT.

> . . .



=====

-- John

John Jacobus, MS

Certified Health Physicist

e-mail:  crispy_bird@yahoo.com



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