Re: Children may get too much radiation in CT scan

["ruth_weiner" <ruth_weiner@email.msn.com>]

I also read the article, and what it says is "an increased RISK of fatal
cancer" (emphasis mine) -- not an increased incidence.  These risk estimates
are based on the good old LNT theory and are nothing more than application
of a linear dose-to-LCF cconversion factor.  I think risk estimates like
this should be viewed with caution.

ruth weiner
ruth_weiner@msn.com

-----Original Message-----
From: Thomas J Savin <tjsav@lycos.com>
To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
Date: Tuesday, January 23, 2001 7:52 AM
Subject: Re: Children may get too much radiation in CT scan


>Hi Everyone
>
>Sandy brings up some interesting points.  I have placed Dr. Donnely's
resume from the hospital's
>web page for your inspection - it is quite impressive.  I also am providing
for those who are interested the cite in which you call up the papers in
their entirity:  I have printed them out and will read them later.  My gut
feeling after a Quick scan is the news report is somewhat biased, because in
the actual paper it states that "500 is a rough estimate", and "up to 500".
I am going to go through these, but right now I have a meeting - Enjoy - Tom
>
>http://www.ajronline.org/current.shtml#EDITOR'S NOTEBOOK
>
>http://www.cincinnatichildrens.org/facultyandstaff/facultyandstaff.asp?id=7
85&page_format=research
>---
>Tom Savin
>
>On Mon, 22 Jan 2001 22:04:10
> Sandy Perle wrote:
>>My personal observations:
>>
>>(1) There is not one mention of any actual dose values. This
>>information would be helpful to put some of the many insinuations
>>into perspective.
>>
>>(2) The term "overdoses" always irks me. Since medical radiation
>>exposure is basically not regulated, are these researchers taking
>>license in comparing the CT scan dose to the permissible dose to
>>minors, as found in 10CFR20? A minor is permitted to receive 500
>>mrem/year (5.00 mSv/year). Is any dose  above this value what
>>they deem to be an over-exposure?
>>
>>(3) 500 cancer deaths a year? Any scientific studies to validate
>>these claims?  How many of these children already have cancer,
>>or, are in a pre-cancerous condition, which is only detected after
>>the scan, and then the assumption si that the scan is the
>>causative factor?
>>
>>Comments on the article would be appreciated.
>>--------------
>>
>>Children may get too much radiation in CT scan
>>
>
>
>Get your small business started at Lycos Small Business at
http://www.lycos.com/business/mail.html
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