[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: The "right" answer
Jim,
What was the thyroid dose for the UK(?) study? Also,
are the other thyroid studies to children or adults?
Were the exposures from external sources or internal
emitters?
--- Jim Muckerheide <jmuckerheide@cnts.wpi.edu> wrote:
> The 25-year series of Israel tinea capitis studies
> by Modan (notorious
> in nuclear medicine for other reasons), Ron and
> others claim an excess
> of thyroid cancer comparing cases to the general
> population (by age).
> The dose to the thyroid is estimated as 9 cGy.
> Another study (UK?) of
> children with tinea capitis compared those who were
> exposed to scalp
> irradiation and those who weren't, with no
> difference. But the Israel
> study is not consistent with thyroid cancer
> incidence from other
> external thyroid exposures.
>
> [Since cancer is a systemic response, it seems more
> likely that the
> relevant dose may have been to the pituitary gland
> affecting TSH
> production.!?]
>
> But the tinea capitis study is one of the half-dozen
> or so that is
> always dredged up as supporting the LNT (along with
> Alice Stewart 1958,
> even though contradicted by other studies, including
> routine exposure of
> fetuses in healthy-mother conditions), while
> ignoring volumes of
> contradictory data, including dramatic reductions of
> some cancers (both
> prevention and treatment) at exposures in the 10+
> cSv range, in multiple
> fractions to roughly 150 cSv.
>
...
=====
-- John
John Jacobus, MS
Certified Health Physicist
e-mail: crispy_bird@yahoo.com
__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com
************************************************************************
You are currently subscribed to the Radsafe mailing list. To unsubscribe,
send an e-mail to Majordomo@list.vanderbilt.edu Put the text "unsubscribe
radsafe" (no quote marks) in the body of the e-mail, with no subject line.
You can view the Radsafe archives at http://www.vanderbilt.edu/radsafe/