Re: Badge Reading Differences

["R. J. Gunter" <rjgunter@chpconsultants.com>]

Mr Garrett,



 



The difference is not surprising.  You might ask to film dosimeter provider

(I assume this one read higher) to analyze the response assuming the

exposure was from X-rays only (they have this option available if you ask

for given wearers).  This will likely reduce the dose considerably.  In my

consultancy I recommend appropriate dosimeters for clients based on their

use.  Film is an excellent dosimeter if you know exactly what the film was

exposed to and use that assumption when you read it.  More likely than not,

they just ran the film badge with no assumptions.  Angular response exposes

the area under the filter making the effective energy seem higher.  This

makes the overall dose higher by about the factor you mention below.



 



My company can recommend the most appropriate dosimeter for your various

departments allowing for low costs and higher accuracy in those departments

that need it (like Fluoroscopy).



 



I can also review your dose records on a monthly or quarterly basis and work

with your vendor(s) to improve your bottom line and the accuracy of

dosimetry.



 



Let me know if I can be of assistance.



 



Yours,



 



Rob



 



 



Robert J. Gunter, CHP



CHP Consultants



Oak Ridge, TN



Ph:  (865) 387-0028



Fax: (865) 483-7189



rjgunter@chpconsultants.com



www.chpconsultants.com



 



 



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Date: Wed, 21 Jul 2004 13:43:08 -0500



From: JGarrett@mbhs.org



Subject: Badge Reading Differences 



 



To All of the Badge Pros Out There:



 



Recently, I started providing radiation badges to our Radiologists.

Apparently, they have also been issued a badge by their group from another

company - Landauer and GDS are the two companies. The most recent badge

report indicated that two of the Radiologists had a large exposure for the

month and so I sent the docs a letter stating their exposure etc. Well, I

get a call from Radiology stating that the reading from the other company

was completely different - by a factor of about 5 (lower). To compound the

problem, the two readings from my badge were pretty similar yet the readings

from the other company were not. I was told that the Radiologists wore the

two badges right next to each other all the time.



 



Has anyone else seen these differences between badge readings? Or does

anyone know of any differences between readings of Landauer's Luxel+ badge

and GDS' film badge? Thanks in advance.



 



Jeffrey A. Garrett, MS, DABR



Chief Physicist



Mississippi Baptist Medical Center



1225 North State Street



Jackson, MS 39202



 



Office: 601-968-1725



Cancer Center: 601-968-1416 or 1420



Fax: 601-960-3317