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Nima, I think you're on the right track that environmental EMI is likely the cause of the artifact you're seeing. Years ago, I dealt with a similar intermittent issue on Doppler exams that had never been a problem before. After investigation,</div>
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<p class="MsoNormal"><span style="font-size:12.0pt">Nima,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">I think you're on the right track that environmental EMI is likely the cause of the artifact you're seeing.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Years ago, I dealt with a similar intermittent issue on Doppler exams that had never been a problem before. After investigation, we traced it to EMI from a remote cardiac monitoring system that had recently
been installed in the adjacent area. The artifact only appeared when a monitored cardiac patient was present in that space and was only visible during Doppler imaging.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">The problem resolved once construction in the cardiac area was completed and patients moved farther away reducing the EMI in the ultrasound room.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-ligatures:standardcontextual">Thank you,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-ligatures:standardcontextual">Travis C. Greene, M.S., DABR<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-ligatures:standardcontextual">Senior Medical Physicist<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><img width="340" height="58" style="width:3.5458in;height:.6041in" id="Picture_x0020_2139129004" src="cid:image002.jpg@01DCE14A.3474EDA0"><span style="mso-ligatures:standardcontextual"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-ligatures:standardcontextual">9320 McIntosh Road, Dover, Florida 33527-3712<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;mso-ligatures:standardcontextual">Office: 813-685-3796 | FAX 813-685-2448 | Direct: 813-893-3428<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif;mso-ligatures:standardcontextual"><a href="https://urldefense.com/v3/__https://radser.com/satisfaction-survey/__;!!KGKeukY!y3tTA-hB2_h9ATRH7-2iwbrYymddrHiPHA0dEs0MGvpzLxaaoE8DM53NwZ38LIpeqpH7PhMYV7lzpveBw46YC6PnNMBG7K_EW5pinA$"><span style="color:blue">Tell us how we’re doing! </span></a><u><span style="color:blue"><o:p></o:p></span></u></span></b></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><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 <intl_dxmedphys_wd_osu_list-bounces@lists.osu.edu>
<b>On Behalf Of </b>Nima Kasraie via Intl_dxmedphys_wd_osu_list<br>
<b>Sent:</b> Friday, May 8, 2026 12:12 PM<br>
<b>To:</b> DxMedPhys List <intl_dxmedphys_wd_osu_list@lists.osu.edu><br>
<b>Subject:</b> [Intl_DxMedPhys] US Artifact<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" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">Hey folks, Anyone want to take a shot at this intermittent artifact that shows up on our Philips units? Obviously the artifact seems to be tied to beam steering
because it changes direction with the box geometry. But since it is showing up on<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-ligatures:standardcontextual">Hey folks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="mso-ligatures:standardcontextual">Anyone want to take a shot at this intermittent artifact that shows up on our Philips units?<o:p></o:p></span></p>
<p class="MsoNormal"><img border="0" width="217" height="313" style="width:2.2625in;height:3.2583in" id="Picture_x0020_2" src="cid:image003.png@01DCE14A.3474EDA0"><span style="mso-ligatures:standardcontextual"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
<p class="MsoNormal"><img border="0" width="378" height="303" style="width:3.9375in;height:3.1541in" id="_x0000_i1029" src="cid:image004.png@01DCE14A.3474EDA0"><span style="mso-ligatures:standardcontextual"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
<p class="MsoNormal"><img border="0" width="490" height="353" style="width:5.1041in;height:3.6791in" id="Picture_x0020_1" src="cid:image007.png@01DCE14A.3474EDA0"><span style="mso-ligatures:standardcontextual"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual">Obviously the artifact seems to be tied to beam steering because it changes direction with the box geometry.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual">But since it is showing up on multiple machines in the hospital, I suspect one of the following causes:<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo3"><span style="mso-ligatures:standardcontextual">environmental EMI
<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l1 level1 lfo3"><span style="mso-ligatures:standardcontextual">software/firmware issue
<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l1 level1 lfo3"><span style="mso-ligatures:standardcontextual">probe family issue
<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l1 level1 lfo3"><span style="mso-ligatures:standardcontextual">network/power grounding problem
<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l1 level1 lfo3"><span style="mso-ligatures:standardcontextual">shared configuration bug<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual">Thoughts?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><img border="0" width="312" height="87" style="width:3.25in;height:.9083in" id="Picture_x0020_2073100150" src="cid:image008.png@01DCE14A.3474EDA0"></span><b><span style="font-size:12.0pt;color:#3366FF;mso-ligatures:standardcontextual"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:#3366FF;mso-ligatures:standardcontextual">Nima Kasraie, PhD, MSc, DABR, DABSNM<o:p></o:p></span></b></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;mso-ligatures:standardcontextual">Lead Physicist,
<a href="https://urldefense.com/v3/__https:/www.childrens.com/__;!!KGKeukY!w28_FjzspO1hr8U6wAi_awW79spJ2YcpVMChtJ3ZxAyul5s3GjuhuLjOrnRbrgiMfWbY6QiBnGodJUGOawgTaDMuhRm7Llj6CuraIq2TmZxp3IiyucYXGg$">
Children’s Medical Center Dallas</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;mso-ligatures:standardcontextual">Professor,
<a href="https://urldefense.com/v3/__https:/profiles.utsouthwestern.edu/profile/187443/nima-kasraie.html__;!!KGKeukY!w28_FjzspO1hr8U6wAi_awW79spJ2YcpVMChtJ3ZxAyul5s3GjuhuLjOrnRbrgiMfWbY6QiBnGodJUGOawgTaDMuhRm7Llj6CuraIq2TmZxp3Ii5fAF3aw$">
Department of Radiology, UT Southwestern</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;mso-ligatures:standardcontextual">Phone: 214-648-7978<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
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<p align="right" style="margin-bottom:0in;text-align:right"><b><span style="font-size:17.0pt;font-family:"Helvetica",sans-serif;color:#004C97;letter-spacing:-2.25pt">UT</span></b><b><span style="font-size:17.0pt;font-family:"Helvetica",sans-serif;color:#004C97">
Southwestern</span></b> <o:p></o:p></p>
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<p align="right" style="margin:0in;text-align:right"><span style="font-size:13.0pt;font-family:"Helvetica",sans-serif;color:#636466">Medical Center</span><o:p></o:p></p>
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<p align="right" style="margin-top:3.75pt;text-align:right"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#636466">The future of medicine, today.</span><o:p></o:p></p>
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