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RE: Thank you for your encouragement Re: discussion of "effectivedose"



Hi John,



In addition to Harald's letter in the Mar '96 HPJ, you may want to see

his review paper in the Jun '96 HPJ, [70(6):828-31]	"Radiation

physics and radiobiology."



Kellerer has a paper in the same issue: "Radiobiological challenges

posed by microdosimetry."



and there's: 	Chen J, Kellerer AM, Rossi HH.	"On the revised concept

of linear energy transfer." Radiat Environ Biophys. 1995

Mar;34(1):29-35.



Of possible interest:

Hawkins RB.	"A microdosimetric-kinetic model of cell death from

exposure to ionizing radiation of any LET, with experimental and

clinical applications." Int J Radiat Biol. 1996 Jun;69(6):739-55.



There's lot at high doses (therapy, cell killing), with the following at

low dose:



Radiat Meas 2001 Jun;34(1-6):105-8



About some physical mechanisms of statistics of radiation-induced

effects formation and non-linear cell response in low dose area.

Rusov V, Zelentsova T, Melentchuk I, Beglaryan M.

Department of Theoretical and Experimental Nuclear Physics, Odessa

Polytechnic University, Shevchenko av I, Odessa 65044, Ukraine.

siiis@e.net.ua



A new cascade-stochastic approach to solve the direct and inverse

problems of radiation-induced effect statistics in track biodetectors is

presented in this paper. The analysis of the experimental data has made

it possible to establish a non-linear nature of the "dose-effect"

dependence in low dose area. For the first time, a new determination of

the relative biological efficiency and quality coefficient of ionizing

radiation in area of low doses are proposed. c2000 Published by Elsevier

Science Ltd.



[At least it's an Elsevier pub :-)]



Regards, Jim



-----Original Message-----

From:	John Cameron

Sent:	Mon 14-Jan-02 11:12 AM

To:	Christoph Hofmeyr

Cc:	radsafe@list.vanderbilt.edu

Subject:	Thank you for your encouragement Re: discussion of

"effectivedose"



Dear Chris

I hope others feel it would be useful. A problem is that few health 

physicists have thought about this problem.  There are two books 

which would provide relevant background (besides NCRP Report No. 104 

on RBE):

Radiation Protection Quantities: A Radical Reappraisal by Jack 

Simmons and David Watt

available for Medical Physics Publishing (www.medicalphysics.org)

and Has Radiation Protection become a health hazard Gunnar Walinder 

co-published by Medical Physics Publishing.

	The following articles by Harald Rossi discuss some aspects 

of the problem:

Rossi, H.H. Limitation and assessment in radiation protection. 8th 

Lauriston Taylor Lecture. National Council on Radiation Protection 

and Measurement. Bethesda, MD; 1984.



Rossi, H.H. Sensible radiation protection. Health Physics.70(3): 394;

1996.

[In this article Rossi states that radiation protection quantities 

are in a "state of chaos."]



Rossi, H.H. Zaider, M. Radiogenic lung cancer. The effects of low 

doses of low-LET radiation. Rad. and Env. Biophys. 36(2): 85; 1997.



  Rossi, H.H. It is Time for Change HPS Newsletter December 1997 pp 8-9



Rossi, H.H. LN-T and Politics HPS Newsletter January 2000

	I am sure there must be other relevant articles but I'm not 

aware of them. In 1995 I tried to publish a critique of radiation 

protection quantities in Health Physics but it was rejected  as "an 

attack on NCRP". Of course, that is part of the problem.

	Your suggestions would be welcome. It will take many years 

before any changes can be made. Discussing it on the list server 

should help the education part of the problem.

Best wishes, John

-- 

John R. Cameron, Ph.D.

Professor Emeritus,UW-Madison

Departments of Medical Physics, Radiology & Physics

Winter home address:

2678 SW 14th Dr.

Gainesville, FL 32608

(352) 371-9865  FAX 371-9866

e-mail: jrcamero@facstaff.wisc.edu