[ RadSafe ] Sv vs. Gy

George Chabot george_chabot at uml.edu
Tue Oct 19 14:05:46 CDT 2010

Mike, the issue of when and at what dose level absorbed dose and equivalent
dose quantities should be used was at least partially addressed in an answer
to question #8542 on the HPS Ask the Experts web site at

George Chabot
Prof. Emeritus, Univ. of Massachusetts Lowell
George_chabot at uml.edu

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Stabin, Michael
Sent: Tuesday, October 19, 2010 1:32 PM
To: radsafe at agni.phys.iit.edu
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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