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Adding to this What about an assessment of TG270-TR pattern? This is the dynamic test pattern that tests the temporal performance to ensure the refresh rate is appropriate with regards to the gray-level transitions from frame-to-frame. From</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">Adding to this<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">What about an assessment of TG270-TR pattern? This is the dynamic test pattern that tests the temporal performance to ensure the
refresh rate is appropriate with regards to the gray-level transitions from frame-to-frame.
<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">From report 270:<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">“</span><span style="font-size:11.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-US">This report does not make any
specific recommendations for limits when assessing a display’s response time or input latency. However, in cases where there is a delay much greater than two display refresh frames, the user should assess the potential impact on clinical image assessment.
For example, if a medical image is refreshed at a rate of 30 Hz (as in fluoroscopy), a delay in the display greater than 30 ms has the potential for impacting clinical image quality.</span><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">I am interested to learn how it all works out Lee :)<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>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New Roman",serif">Kind regards,</span><span style="font-size:11.0pt;font-family:"Calibri",sans-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"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-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</span><span style="font-size:11.0pt;font-family:"Calibri",sans-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">Medical Physicist</span><span style="font-size:11.0pt;font-family:"Calibri",sans-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">Interior Health, Kelowna, BC
</span><span style="font-size:11.0pt;font-family:"Calibri",sans-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">Office: (250) 980-6157 | Mobile: (250) 826-0722
</span><span style="font-size:11.0pt;font-family:"Calibri",sans-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</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Times New Roman",serif"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><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>
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<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>William Sensakovic via Intl_dxmedphys_wd_osu_list<br>
<b>Sent:</b> 23 June 2026 1:39 PM<br>
<b>To:</b> Wunderle, Kevin via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list@lists.osu.edu><br>
<b>Subject:</b> Re: [Intl_DxMedPhys] Rads reading with virtual desktop<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">This is regular diagnostic, not mammography, correct? The software is cleared for PHI? How does the system respond when bandwidth not sufficient? Does it just load
longer or does it compress? If the latter, is there an indication to the reader<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">This is regular diagnostic, not mammography, correct?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">The software is cleared for PHI? <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">How does the system respond when bandwidth not sufficient? Does it just load longer or does it compress? If the latter, is there an indication to the reader that it is not loaded at full quality? <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Did you check any phantom image to confirm resolution is transferring correctly with no aliasing? <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Last question, how does the Dicom GSDF apply? Is it calibrated with an image sent through the virtual machine? Not sure if that is necessary but might be good to check the full curve.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Not sure any of that is regulatory, but just things I could think of that might impact the read.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Breast,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Bill<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:black">William F. Sensakovic, PhD, MRSC(MRSE), FAAPM<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Chair and Assoc. Prof., Mayo Clinic (Arizona)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Founder, Telerad Physics Teaching, LLC<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:"Calibri",sans-serif">From:</span></b><span style="font-family:"Calibri",sans-serif"> Intl_dxmedphys_wd_osu_list <<a href="mailto:intl_dxmedphys_wd_osu_list-bounces+wfsensak=outlook.com@lists.osu.edu">intl_dxmedphys_wd_osu_list-bounces+wfsensak=outlook.com@lists.osu.edu</a>>
on behalf of Lee Kiessel via Intl_dxmedphys_wd_osu_list <<a href="mailto:intl_dxmedphys_wd_osu_list@lists.osu.edu">intl_dxmedphys_wd_osu_list@lists.osu.edu</a>><br>
<b>Sent:</b> Tuesday, June 23, 2026 9:17 AM<br>
<b>To:</b> Wunderle, Kevin via Intl_dxmedphys_wd_osu_list <<a href="mailto:intl_dxmedphys_wd_osu_list@lists.osu.edu">intl_dxmedphys_wd_osu_list@lists.osu.edu</a>><br>
<b>Subject:</b> [Intl_DxMedPhys] Rads reading with virtual desktop</span> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">We have one radiologist who transitioned his home reading station from using a local PACS viewer to reading images through a virtual desktop (images are loaded on a virtual machine, and the display is streamed,
uncompressed, to his home workstation). This is supposedly to help with network bandwidth issues with slow image loading.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I’ve verified that the images are translating to the proper display luminance by loading test patterns in PACS on the virtual machine and viewing them on the home displays. Similarly high contrast bar patterns
display properly as well.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Our system is considering rolling this out to more radiologists, so I’d like to check to make sure I’m not missing anything that could compromise image quality. Has anyone had experience with radiologists
using a similar virtual desktop setup to view images? Are there any pitfalls that I may be overlooking?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks in advance!</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">Lee M Kiessel, PhD, DABR </span>
</b><span style="font-size:11.0pt">| Chief Diagnostic Physicist</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Avera McKennan Hospital and University Health Center</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">1325 S Cliff Ave | Sioux Falls, SD 57105</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Direct: 605-322-6279 | Cell: 605-838-8089</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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