Re: Personnel Monitoring Data Needed

["Wesley M. Dunn" <WDUNN@brc1.tdh.state.tx.us>]

Just to clarify Sandy's note:

First, Sandy's reference is for x-ray exposures.  The NRC does NOT 
regulate x-ray exposures -- the States do.  Texas is one state that 
allows multi-badging for flouroscopy (primarily because of cardiac 
cath).  No other use of mulit-badging is allowed in the medical 
profession.  If the CRCPD Suggested State Regulations don't already 
allow for mulit-badging in this case, the next revision will.  
However, this does NOT mean every state allows multi-badging.  

Furthermore, the multi-badging in this case is based on documented 
research of (1) appropriate correction factors; and (2) the need for 
a "fix".  Cardiologists were going over the 5 rem limit if they were 
restricted to unduly conservative requirements.

Wes

> Date sent:      Wed, 29 Jan 97 22:46:10 -0600
> Send reply to:  radsafe@romulus.ehs.uiuc.edu
> From:           "Sandy Perle" <sandyfl@ix.netcom.com>
> To:             Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
> Subject:        Re: Personnel Monitoring Data Needed

> In the medical arena, I find many physicians, specifically those 
> working in the "Cath Lab" wearing a single collar badge and a 
> single chest badge worn under the lead apron. A weighting factor is 
> used and when the dosimetry is worn properly, which isn't always the 
> case, the EDE assigned is much lower. The process works to reduce the 
> very high doses the physicans had been receiving when wearing the 
> collar badge. The question remains, is the weighted factor valid .. 
> is it representative of the EDE? I am not familiar with the 
> methodology used to arrive at the equation, which is:
> EDE =(1.5*chest badge) + (0.04*collar badge). This works well IF the 
> chest badge IS under the apron. When not, the EDE is actually much 
> higher than the higher of the two individual dosimeters. The medical 
> profession is allowed to use this. This would be very useful IF the 
> NRC allowed other type radiation workers to use a program similar in 
> nature. This type of program would make a multibadging program 
> unnecessary (as we had in the 80s) and be much more manageable. 

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Wesley M. Dunn, CHP                        512-834-6688
Deputy Director, Licensing                 512-834-6690 (fax)
(Texas) Bureau of Radiation Control        wdunn@brc1.tdh.state.tx.us
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