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I can't think of any specific sources, but you can easily test using the same technique with and without a phantom next to the dosimeter and see if there is any increase in AKR with the phantom in place. Another way that I have used is measuring</div>
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<div dir="ltr">I can't think of any specific sources, but you can easily test using the same technique with and without a phantom next to the dosimeter and see if there is any increase in AKR with the phantom in place. Another way that I have used is measuring with a 60 cc pancake ion chamber and the solid-state multisensor simultaneously (you can do this with the Radcal AccuGold system) with and without a phantom in place. I assume our solid-state sensors (Radcal AGMS-DM+) don't include backscatter contribution. There is at least a few mm of tungsten backing them and no matter what technique you use on them, it still shows up as a radiopaque block; I can't speak for the other vendors' solid-state dosimeters though. Hope that helps a bit.<div><br></div><div>-Seth</div><div> </div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><p style="margin:0in 0in 0.0001pt;font-family:sans-serif"><span style="color:rgb(0,0,0);font-family:Calibri,sans-serif"><span style="font-family:"Century Gothic",sans-serif;color:rgb(54,54,54)"><b>Seth W. Streitmatter, PhD, DABR</b></span></span><span style="color:rgb(54,54,54);font-family:"Century Gothic",sans-serif"><br>Diagnostic Medical Physicist</span></p><p style="margin:0in 0in 0.0001pt;font-family:sans-serif"><span style="color:rgb(54,54,54);font-family:"Century Gothic",sans-serif">Assistant Professor<br><br><b>University of Utah Health</b><br></span>Radiology and Imaging Sciences<br></p><p class="MsoNormal" style="margin:0in;font-family:Calibri,sans-serif;color:rgb(33,33,33)">HELIX Tower</p><p class="MsoNormal" style="margin:0in;font-family:Calibri,sans-serif;color:rgb(33,33,33)">30 N Mario Capecchi Dr. 2 South</p><p class="MsoNormal" style="margin:0in;font-family:Calibri,sans-serif;color:rgb(33,33,33)">Salt Lake City, UT 84112</p><p style="margin:0in 0in 12pt;font-family:Calibri,sans-serif;color:rgb(0,0,0)"><span style="font-family:"Century Gothic",sans-serif;color:rgb(54,54,54)">O: 801.581.2271</span></p></div></div></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, Jul 17, 2025 at 8:18 AM Peter Watson, Mr 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>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg7084344475181833443">
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Hi, I'm wondering if anyone has some references for the effectiveness of shielded dose meters (i. e. RadCal AGMS, RTI Piranha, etc. ) for reducing the influence of backscatter off of phantoms (PMMA, copper, etc. ) when measuring air kerma/ air</div>
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Hi,</div>
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I'm wondering if anyone has some references for the effectiveness of shielded dose meters (i.e. RadCal AGMS, RTI Piranha, etc.) for reducing the influence of backscatter off of phantoms (PMMA, copper, etc.) when measuring air kerma/ air kerma rate in diagnostic
radiology QA. A quick literature search didn't turn anything up, and I thought I would crowdsource the listserve before asking my favourite genAI.</div>
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Thanks,</div>
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-P</div>
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<p style="direction:ltr;margin-top:0px;margin-bottom:0px"><span style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">Peter Watson, PhD, MCCPM</span></p>
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(masculine pronouns)</div>
<p style="direction:ltr;margin-top:0px;margin-bottom:0px"><span style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">Medical Physicist, McGill University Health Centre</span></p>
<p style="direction:ltr;margin-top:0px;margin-bottom:0px"><span style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">Assistant Professor, Medical Physics Unit and Department of Oncology, McGill University</span></p>
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