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RE: Badge Readings Part 2
Jeff,
Seems like there have been a few cases like this and as far as I recall the
outcomes have been equivocal.
How about a test? Get an X-ray dosimeter and measure an EDE for an x-ray
unit. Estimate the absorbed dose and irradiate one each Luxel , GDS film in
the same exposure. You could establish a couple of temporary badge users,
resident #1 & #2 or student or fellow, not giving a SSN or concoct one like
123 98 3456. You would need to work with the other dosimetry issuer.
Be interesting to see what's going on.
Any opinions in this e-mail are solely those of the author, and are not
represented as those of the VA Eastern Colorado HCS, the Dept. of Veterans
Affairs, or the US Government.
Peter G. Vernig, Radiation Safety Officer, VA Eastern Colorado Health Care
System, 1055 Clermont St. Denver, CO 80220, peter.vernig@med.va.gov, Phone=
303.399.8020 x2447; Fax = 303.393.5026, alternate fax, 303.393.5248
"...whatever is true, whatever is noble, whatever is lovely, whatever is
admirable, if anything is found to be excellent or praiseworthy, let your
mind dwell on these things."
Paul of Tarsus
-----Original Message-----
From: JGarrett@mbhs.org [mailto:JGarrett@mbhs.org]
Sent: Thursday, July 22, 2004 7:13 AM
To: radsafe@list.vanderbilt.edu; MEDPHYS@LISTS.WAYNE.EDU
Subject: Badge Readings Part 2
Thanks to all who have replied to my first post. Here is a little more
information. Disclaimer: When reading the badge readings below, hold your
breath and let it out slowly. Anyway, the two individuals that the subject
of this line of communication are Radiologists. The Landauer badge was
provided by me (the hospital) and the GDS badge was issued by their
Physician's group. I was actually unaware that they had a badge because I
was asked to provide one for them. Here are the exposure numbers:
Physician #1 Landauer Reading = 627 mrem ; GDS Reading = 108 mrem
(Landauer reported this was a Static Exposure)
Physician #2 Landauer Reading = 652 mrem ; GDS Reading = 382 mrem
(Landauer reported this was a Dynamic Exposure)
None of the readings have the EDE2 correction applied. The two things that
standout are (1) The Landauer readings are significantly much higher than
the GDS readings; (2) The readings are not consistent. Obviously one reason
could be that the radiologists are not in fact wearing both badges in the
same location every time they are around radiation. We (meaning I) have had
problems with high badges readings for a couple of years now. This has been
brought to the attention of the RSC. The EDE2 correction has pretty much
eliminated the reportable readings. But the high 'raw' readings are still
there. The usual suspects are the usual subjects - Cardiologists,
Radiologists and Rad Techs working in fluoro. I wouldn't cite quality
control on Landauer's part right now as it is the same people getting high
readings - QC would show random high readings.
Is there any data that shows Luxel over responds significantly at higher
exposures - a nonlinear response to exposure?
I have been contacted by reps from both Landauer and GDS as well as a 3rd
company. So at least they are responsive.
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
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