[ RadSafe ] A question of semantics

John R Johnson idias at interchange.ubc.ca
Tue Oct 19 13:21:12 CDT 2010


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 R Johnson, PhD
4535 West 9th Ave
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.


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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