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Hi All, Not sure if this is related. I had similar issues for head scans (abdomen was fine) on X. ceed. I did acceptance testing of a X. ceed early last week. I did head scans using Hr44 and Hr40 with iBHC (iterative beam hardening correction)</div>
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<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US">Hi All,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US">Not sure if this is related. I had similar issues for head scans (abdomen was fine) on X.ceed.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US">I did acceptance testing of a X.ceed early last week. I did head scans using Hr44 and Hr40 with iBHC (iterative beam hardening correction)
on and off. My results are below. iBHC is used clinically. I did shut ADMIRE off.<o:p></o:p></span></p>
<p class="MsoNormal"><img width="587" height="201" style="width:6.1145in;height:2.0937in" id="Picture_x0020_1" src="cid:image001.png@01DBFC95.327A3CC0"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US">Longer story – I had perhaps a similar issue on a new Flash unit in 2023. In that case I was told by the Applications folks to adjust
the Cupping Correction from 0 to 1. (I don’t think it had iHBC and that machine is hours away from me). In that case it was only Bone that was out. We did a side-by-side comparison with the radiologists and they preferred Cupping 1. Both are Hr40 and ADMIRE
off.<o:p></o:p></span></p>
<p class="MsoNormal"><img width="460" height="177" style="width:4.7916in;height:1.8437in" id="_x0000_i1028" src="cid:image002.png@01DBFC95.D8EFC340"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US">I found the same issue with a Force scanner this past January. (Hr40 kernel and Admire off.) I don’t know if this Force has iHBC
and I have not had a chance to check yet.<o:p></o:p></span></p>
<p class="MsoNormal"><img width="483" height="202" style="width:5.0312in;height:2.1041in" id="_x0000_i1027" src="cid:image003.png@01DBFC96.EB420CF0"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New Roman",serif">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New Roman",serif">Thor Bjarnason, PhD, PEng, FCCPM<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New Roman",serif">Medical Physicist<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New Roman",serif">Interior Health, Kelowna, BC
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif">Office: (250) 980-6157 | Mobile: (250) 826-0722</span><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif">
</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New Roman",serif">Thor.Bjarnason@interiorhealth.ca<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+thor.bjarnason=interiorhealth.ca@lists.osu.edu>
<b>On Behalf Of </b>Szczykutowicz, Timothy P via Intl_dxmedphys_wd_osu_list<br>
<b>Sent:</b> 24 July 2025 8:47 AM<br>
<b>To:</b> Imendra Ranatunge <ranatunge@gmail.com>; Kalpana M. Kanal <kkanal@uw.edu><br>
<b>Cc:</b> intl_dxmedphys_wd_osu_list@lists.osu.edu<br>
<b>Subject:</b> Re: [Intl_DxMedPhys] CT Number Deviations on Siemens Force and Alpha – ACR Phantom Failures<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">It is Audi mode. (using a special kernel for passing tests)
</span><span style="font-size:1.0pt;font-family:"Segoe UI Emoji",sans-serif;color:white">😉</span><span style="font-size:1.0pt;color:white"> Must be a German thing, albeit Canon also has you do this in terms of beam collimation and slice thickness for their
specifications (they want you to use a ridiculous collimation<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">It is Audi mode. (using a special kernel for passing tests)
</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Segoe UI Emoji",sans-serif">😉</span><span lang="EN-US" style="font-size:11.0pt">
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">Must be a German thing, albeit Canon also has you do this in terms of beam collimation and slice thickness for their specifications (they want you to use a ridiculous collimation we would never
use on patients for their noise and LCD measurements)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;mso-ligatures:standardcontextual">Timothy P. Szczykutowicz, Ph.D., DABR<br>
Professor<br>
Departments of Radiology, Medical Physics and BME<br>
University of Wisconsin Madison<br>
Cell# <a href="tel:(716)%20560-7751" target="_blank">1-716-560-7751</a><br>
Office# 1-608-263-5729<br>
he/him/his</span><span lang="EN-US" style="font-family:"Times New Roman",serif"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Intl_dxmedphys_wd_osu_list <<a href="mailto:intl_dxmedphys_wd_osu_list-bounces+tszczykutowicz=uwhealth.org@lists.osu.edu">intl_dxmedphys_wd_osu_list-bounces+tszczykutowicz=uwhealth.org@lists.osu.edu</a>>
<b>On Behalf Of </b>Imendra Ranatunge via Intl_dxmedphys_wd_osu_list<br>
<b>Sent:</b> Thursday, July 24, 2025 9:24 AM<br>
<b>To:</b> Kalpana M. Kanal <<a href="mailto:kkanal@uw.edu">kkanal@uw.edu</a>><br>
<b>Cc:</b> <a href="mailto:intl_dxmedphys_wd_osu_list@lists.osu.edu">intl_dxmedphys_wd_osu_list@lists.osu.edu</a><br>
<b>Subject:</b> Re: [Intl_DxMedPhys] CT Number Deviations on Siemens Force and Alpha – ACR Phantom Failures<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p align="center" style="text-align:center"><span lang="EN-US" style="font-family:"Calibri",sans-serif;color:red;background:yellow">WARNING: This email appears to have originated outside of the UW Health email system.<br>
DO NOT CLICK on links or attachments unless you recognize the sender and know the content is safe.</span><span lang="EN-US"><o:p></o:p></span></p>
<div>
<div>
<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span lang="EN-US" style="font-size:1.0pt;color:white">Thank you. Yes, I used QIR as well. On Thu, Jul 24, 2025 at 9:</span><span lang="EN-US" style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span lang="EN-US" style="font-size:1.0pt;color:white">21
AM Kalpana M. Kanal <kkanal@</span><span lang="EN-US" style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span lang="EN-US" style="font-size:1.0pt;color:white">uw.</span><span lang="EN-US" style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span lang="EN-US" style="font-size:1.0pt;color:white">edu>
wrote: That's what was recommended to us as well for any measurements. We tested our Alpha last week and had no issues. Kalpana Kalpana<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-US">Thank you. Yes, I used QIR as well.<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<div>
<p class="MsoNormal"><span lang="EN-US">On Thu, Jul 24, 2025 at 9:21</span><span lang="EN-US" style="font-family:"Arial",sans-serif"> </span><span lang="EN-US">AM Kalpana M. Kanal <<a href="mailto:kkanal@uw.edu" target="_blank">kkanal@uw.edu</a>> wrote:<o:p></o:p></span></p>
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<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
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<p class="MsoNormal"><span lang="EN-US">That's what was recommended to us as well for any measurements. We tested our Alpha last week and had no issues. <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span lang="EN-US">Kalpana <o:p></o:p></span></p>
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<div id="m_-5558971797196174784m_-452077745767953407ms-outlook-mobile-body-separator-line">
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<div id="m_-5558971797196174784m_-452077745767953407ms-outlook-mobile-signature">
<p style="margin:0cm;background:white"><span lang="EN-US" style="font-size:8.0pt;font-family:"Calibri",sans-serif;color:#7F7F7F">Kalpana M. Kanal, PhD, DABR, FACR, FAAPM, FSABI</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p style="margin:0cm;background:white"><span lang="EN-US" style="font-size:8.0pt;font-family:"Calibri",sans-serif;color:#7F7F7F">Director, Diagnostic Physics Section and Resident Education</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p style="margin:0cm;background:white"><span lang="EN-US" style="font-size:8.0pt;font-family:"Calibri",sans-serif;color:#7F7F7F">Program Director, Imaging Physics Residency Program</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p style="margin:0cm;background:white"><span lang="EN-US" style="font-size:8.0pt;font-family:"Calibri",sans-serif;color:#7F7F7F">Professor, Radiology</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p style="margin:0cm;background:white"><span lang="EN-US" style="font-size:8.0pt;font-family:"Calibri",sans-serif;color:#7F7F7F">Affiliate Faculty, Harborview Injury Prevention Center (HIPRC)</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p style="margin:0cm;background:white"><span lang="EN-US" style="font-size:8.0pt;font-family:"Calibri",sans-serif;color:#7F7F7F">Adj. Professor, Oral Medicine</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+kkanal=<a href="mailto:uw.edu@lists.osu.edu" target="_blank">uw.edu@lists.osu.edu</a>>
on behalf of Shane McCotter via Intl_dxmedphys_wd_osu_list <<a href="mailto:intl_dxmedphys_wd_osu_list@lists.osu.edu" target="_blank">intl_dxmedphys_wd_osu_list@lists.osu.edu</a>><br>
<b>Sent:</b> Thursday, July 24, 2025 7:17:34 AM<br>
<b>To:</b> Imendra Ranatunge <<a href="mailto:ranatunge@gmail.com" target="_blank">ranatunge@gmail.com</a>><br>
<b>Cc:</b> <a href="mailto:intl_dxmedphys_wd_osu_list@lists.osu.edu" target="_blank">
intl_dxmedphys_wd_osu_list@lists.osu.edu</a> <<a href="mailto:intl_dxmedphys_wd_osu_list@lists.osu.edu" target="_blank">intl_dxmedphys_wd_osu_list@lists.osu.edu</a>><br>
<b>Subject:</b> Re: [Intl_DxMedPhys] CT Number Deviations on Siemens Force and Alpha – ACR Phantom Failures</span><span lang="EN-US">
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span lang="EN-US" style="font-size:1.0pt;color:white">Not sure if this will help, but try using the Quantative recon method (if I remember right). Had this issue with a Siemens before and apps recommended
that recon. Shane Sent from my iPhone On Jul 24, 2025, at 8:</span><span lang="EN-US" style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span lang="EN-US" style="font-size:1.0pt;color:white">37 AM, Imendra Ranatunge via Intl_dxmedphys_wd_osu_list<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Not sure if this will help, but try using the Quantative recon method (if I remember right). Had this issue with a Siemens before and apps recommended that recon.
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<p class="MsoNormal"><span lang="EN-US">Shane <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Sent from my iPhone<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US">On Jul 24, 2025, at 8:37</span><span lang="EN-US" style="font-family:"Arial",sans-serif"> </span><span lang="EN-US">AM, Imendra Ranatunge via Intl_dxmedphys_wd_osu_list <<a href="mailto:intl_dxmedphys_wd_osu_list@lists.osu.edu" target="_blank">intl_dxmedphys_wd_osu_list@lists.osu.edu</a>>
wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span lang="EN-US" style="font-size:1.0pt;color:white">Hi All, I’m encountering an issue with a couple of my Siemens CT scanners—specifically the Force and Alpha models. Several of my CT number measurements
using the ACR phantom are failing for air, water, and bone. Some units fail all three, while<o:p></o:p></span></p>
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<p><span lang="EN-US">Hi All,<o:p></o:p></span></p>
<p><span lang="EN-US">I’m encountering an issue with a couple of my Siemens CT scanners—specifically the Force and Alpha models. Several of my CT number measurements using the ACR phantom are failing for air, water, and bone. Some units fail all three, while
others only one or two.<o:p></o:p></span></p>
<p><span lang="EN-US">I tried placing a CTDI phantom adjacent to the ACR phantom, but it showed no improvement.<o:p></o:p></span></p>
<p><span lang="EN-US">I reported the issue to Siemens. They performed a constancy test and stated that the units were functioning normally. However, my CT number results are still outside acceptable limits. In my experience, service engineers are often reluctant
to perform time-consuming calibrations unless specifically requested.<o:p></o:p></span></p>
<p><span lang="EN-US">Has anyone experienced this before? If so, do you know which specific calibration or adjustment Siemens needs to perform to correct these CT number inaccuracies?<o:p></o:p></span></p>
<p><span lang="EN-US">Imendra<o:p></o:p></span></p>
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