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Hi, I had a similar issue once with a Siemens scanner where the slice thickness would not change regardless of the setting I applied. The facility contacted Siemens and they recommended changing the inline filter in service mode. The issue was</div>
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<div dir="ltr">Hi, I had a similar issue once with a Siemens scanner where the slice thickness would not change regardless of the setting I applied.<br><div>The facility contacted Siemens and they recommended changing the<b> inline filter </b>in service mode.</div><div>The issue was fixed immediately after. </div><div>Hopefully, this will work for you. </div><div><br></div><img src="cid:ii_mmdq2cqv5" alt="image.png" width="496" height="92"><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Mar 3, 2026 at 7:34 PM Bob Kobistek 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="msg8090807244652829922">
<div style="font-size:1px;color:rgb(255,255,255);line-height:1px;max-height:0px;opacity:0;overflow:hidden;display:none">
I’m having difficulty with the slice thickness ramps on an ACR phantom scan on a Siemens Magnetom Lumina scanner. (3T) The following is an image of the slice thickness ramps with the window set as described in the scanning instructions</div>
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<p class="MsoNormal">I’m having difficulty with the slice thickness ramps on an ACR phantom scan on a Siemens Magnetom Lumina scanner. (3T) The following is an image of the slice thickness ramps with the window set as described in the scanning instructions
on the ACR T2 sequence. What a mess!<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span><img width="1045" height="278" style="width: 10.8854in; height: 2.8958in;" id="m_8090807244652829922_x0000_i1028" src="cid:ii_19cbef81a044cff311"></span><u></u><u></u></p>
<p class="MsoNormal">This is what it looks like with normal windowing:<u></u><u></u></p>
<p class="MsoNormal"><span><img width="1005" height="262" style="width: 10.4687in; height: 2.7291in;" id="m_8090807244652829922Picture_x0020_2" src="cid:ii_19cbef81a045b16b22"></span><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">The ACR T1 series is messy, but not as bad. I tried turning filters on and off. Suspecting it might be due to excessive Gibbs ringing, I increased the bandwidth. No difference.
<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">The site series look better, but they fail, and the T1 scan has those areas to the left and right of higher intensity:<u></u><u></u></p>
<p class="MsoNormal"><span><img width="1166" height="228" style="width: 12.1406in; height: 2.375in;" id="m_8090807244652829922_x0000_i1026" src="cid:ii_19cbef81a047745b43"></span><u></u><u></u></p>
<p class="MsoNormal">T2<u></u><u></u></p>
<p class="MsoNormal"><span><img width="758" height="246" style="width: 7.8906in; height: 2.5625in;" id="m_8090807244652829922Picture_x0020_1" src="cid:ii_19cbef81a04855d354"></span><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Any ideas?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-family:Arial,sans-serif;color:rgb(165,0,33)">Robert J. Kobistek, MS, FACR, DABR, MRSE(MRSC™)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:Arial,sans-serif;color:rgb(165,0,33)">Medical Physicist</span><span style="font-size:11pt"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:22pt;font-family:Castellar,serif;color:rgb(165,0,33)">RJK</span><span style="font-size:22pt;font-family:"Colonna MT";color:rgb(165,0,33)">
</span><span style="font-size:14pt;color:rgb(165,0,33)">Medical Physics, Inc.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:14pt;color:rgb(165,0,33)">440-463-7879<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
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</div></blockquote></div>