[ RadSafe ] Is this the beginning of the end of the debate on low-dose radiation effects?

[Doss, Mohan]

Dear Otto,
    Your publication pre-dates the Ozasa 2012 update to the atomic bomb survivor data, which shows a deviation from linearity of dose-response curve (significant curvature - see Table 7 of Ozasa 2012) likely due to lower than expected cancer rates in the 0.3-0.7 Gy region (please see text on p. 238 of the Ozasa et al paper).  There are also other data that show reduction in cancers following low-dose radiation exposures, as seen in:  http://evidence-for-threshold-or-hormesis.blogspot.com/    I did not notice the inclusion of the concept of such adaptive protection in your 2011 publication.  For example, the paper states in part: " In fact, the increase in cancer among the atomic bomb survivors tended to follow a linear pattern. Deterministic cancer promotion rather than stochastic cancer induction better explains the increase of solid cancers in the atomic bomb survivor studies. "  The atomic bomb survivor data do not follow a linear pattern of dose-response any longer.   I would suggest revising your analysis to include adaptive protection to bring it in line with the latest atomic bomb survivor and other data that show reduction of cancers at low doses.
   With best regards,
                                              Mohan

Mohan Doss, Ph.D., MCCPM
Medical Physicist,
Associate Professor, Diagnostic Imaging,
Fox Chase Cancer Center,
333 Cottman Avenue,
Philadelphia, PA 19111-2497.
Phone: 215 214-1707
Website: http://www.fccc.edu/research/pid/doss/
Blogs: http://mohan-doss-home-page.blogspot.com/


-----Original Message-----
From: radsafe-bounces at agni.phys.iit.edu [mailto:radsafe-bounces at agni.phys.iit.edu] On Behalf Of Otto G. Raabe
Sent: Tuesday, July 08, 2014 11:50 AM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: [ RadSafe ] Is this the beginning of the end of the debate on low-dose radiation effects?

8 July 2014

The low dose issue is completely explained in my Health Physics Journal  Forum paper:

"Toward Improved Ionizing Radiation Safety Standards"
Health Phys. 101: 84-93; 2011

E-mail me if you want a copy.

Otto

**********************************************
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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