[Intl_DxMedPhys] Dosimeter calibrations - question/PSA

[Jeremy Corwin]

Thank you for posting this!  We had exactly the same issue.  Calibrated in July 2026.   Calibration papers show calibrated at 500 and 50 cd/m2 and was within 2-3%.
But when we took it out to our first site it was measuring at about what you stated, 1/10th of what it should.
We initiated a RMA and are sending it back.  Yes, there must be an issue at the calibration lab.
There are probably others out there, so I'm glad you mentioned this.

Jeremy L. Corwin, MHP, DABHP
Medical Physicist
Phone: (360) 736-6066 / Fax: (360) 736-7293
https://urldefense.com/v3/__http://www.corwinhp.com__;!!KGKeukY!2TymMTWhwKC0NgLZf62WF9DJcu3Gpv_K9BjqKjpsbg9CmiKijD-srFkZts-H0kchkK4AI11xSRd1A5K7860KiiIwVyee0mbfrQTq-ps$ <https://urldefense.com/v3/__http://www.corwinhp.com__;!!KGKeukY!2TymMTWhwKC0NgLZf62WF9DJcu3Gpv_K9BjqKjpsbg9CmiKijD-srFkZts-H0kchkK4AI11xSRd1A5K7860KiiIwVyee0mbfrQTq-ps$ >

[CHP_email_2017]

From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+jeremy=corwinhp.com at lists.osu.edu> On Behalf Of Milman, Rebecca via Intl_dxmedphys_wd_osu_list
Sent: Monday, August 10, 2026 12:03 PM
To: DxMedPhys List <intl_dxmedphys_wd_osu_list at lists.osu.edu> <intl_dxmedphys_wd_osu_list at lists.osu.edu>
Subject: [Intl_DxMedPhys] Dosimeter calibrations - question/PSA

Hi, colleagues, I have a combined question/PSA about RaySafe measurement devices. We recently received an Xi back from calibration, and the luminance meter was calibrated incorrectly (by a factor of 10). Is anyone else having issues with this?
[cid:image002.png at 01DD2977.86EBF2C0]

Hi, colleagues,

I have a combined question/PSA about RaySafe measurement devices. We recently received an Xi back from calibration, and the luminance meter was calibrated incorrectly (by a factor of 10).

Is anyone else having issues with this? Also (the PSA part!) our calibration report indicated everything had passed. The calibration report said it was tested (and measured) post-calibration at 50 cd/m^2 and passed (despite it typically being calibrated at 500 cd/m^2). Something in the calibration report is incorrect, which is especially concerning. (FWIW, we contacted RaySafe about this a week ago but still have not heard anything other than that the case is being directed to their service department.)

Thanks,

Rebecca.


Rebecca Milman, Ph.D., DABR
Division Chief, Radiological Sciences | Associate Professor
Department of Radiology
University of Colorado Anschutz
720.848.6625

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osu.edu/pipermail/intl_dxmedphys_wd_osu_list/attachments/20260811/fd14e47d/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 3946 bytes
Desc: image001.png
URL: <http://lists.osu.edu/pipermail/intl_dxmedphys_wd_osu_list/attachments/20260811/fd14e47d/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.png
Type: image/png
Size: 374902 bytes
Desc: image002.png
URL: <http://lists.osu.edu/pipermail/intl_dxmedphys_wd_osu_list/attachments/20260811/fd14e47d/attachment-0001.png>