[ RadSafe ] [ Radiate ] A question of semantics

[Bill DeForest]

Use Sv when the primary effect of concern is stochastic (cancer induction)
in nature, Gy when the threshold is reached for deterministic
(non-stochastic) effects is reached (~0.5 Gy).

Bill DeForest, CHP, DABR
President, ProPhysics Innovations, Inc.
billd at prophysics.com 
400 Dominion Drive, #109 Morrisville, NC 27560 
(800) 835-3615 
(919) 465-2545 
Fax: (919) 465-2544


www.prophysics.com


-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of John R Johnson
Sent: Tuesday, October 19, 2010 2:21 PM
To: The International Radiation Protection (Health Physics) Mailing List;
radsafe at agni.phys.iit.edu
Subject: Re: [ RadSafe ] A question of semantics

Mike

As to your Sv vs Gy question, I always use Gy to get the energy deposited 
and Sv to calculate the risk. i.e; Gy = absorded dose, Sv = equivalent and 
effective dose. These are also the ICRP "usage".

John
***************
John R Johnson, PhD
CEO, IDIAS, Inc.
4535 West 9th Ave
604-676-3556
Vancouver, B. C.
V6R 2E2, Canada
idias at interchange.ubc.ca

----- Original Message ----- 
From: "Stabin, Michael" <michael.g.stabin at Vanderbilt.Edu>
To: <radsafe at agni.phys.iit.edu>
Sent: Tuesday, October 19, 2010 10:32 AM
Subject: Re: [ RadSafe ] A question of semantics


> One of our trainers referred to 'x-radiation'. I understand what he means,

> but have not seen it called antyhing other than x-rays or 'fluorescent 
> radiation' in my manuals from Cember Knoll, etc.... Is this a legitimate 
> word to use in training?
>Luke McCormick

Good question, I would like to hear from others. I would not say this, but I

don't see that it is incorrect in any way. From my time on the Part I panel,

I have been convinced that the appropriate usage of "x ray" is like that, 
space, no hyphen, unless you are using it as an adjective, then "x-ray 
beam", for example.

One thing I would like to know is above what dose level we should not use Sv

and use only Gy, and why that level. I've asked some of the best, and still 
have no clear explanation.


Mike

Michael G. Stabin, PhD, CHP
Associate Professor of Radiology and Radiological Sciences
Department of Radiology and Radiological Sciences
Vanderbilt University
1161 21st Avenue South
Nashville, TN 37232-2675
Phone (615) 343-4628
Fax (615) 322-3764
e-mail michael.g.stabin at vanderbilt.edu
internet www.doseinfo-radar.com

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