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The other adjustment that I do is reduce the mag to 0. 66, else it often cuts off part of the phantom. _________________________________________________ Sameer Tipnis, PhD, DABR, FAAPM Professor of Radiology & Chief, Division of Medical Physics</div>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99">The other adjustment that I do is reduce the mag to 0.66, else it often cuts off part of the phantom.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99"><o:p> </o:p></span></p>
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<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#174E86">_________________________________________________</span></i><span style="color:#215E99"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99"> </span></i><span style="color:#215E99"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99">Sameer Tipnis, PhD, DABR, FAAPM</span></i><span style="color:#215E99"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99">Professor of Radiology & Chief, Division of Medical Physics</span></i><span style="color:#215E99"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99">Program Director, Diagnostic Medical Physics Residency</span></i><span style="color:#215E99"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99">Dept. of Radiology and Radiological Sciences</span></i><span style="color:#215E99"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99">Medical University of South Carolina</span></i><span style="color:#215E99"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99">96 Jonathan Lucas Street, MSC 323</span></i><span style="color:#215E99"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99">Charleston, SC 29425</span></i><span style="color:#215E99"><o:p></o:p></span></p>
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<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99">Phone: (843)-792-3833</span></i><span style="color:#215E99"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99">Fax: (843)-792-2642</span></i><span style="color:#215E99"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#215E99">_________________________________________________</span></i><span style="color:#215E99"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#215E99"> </span><span style="color:#215E99"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+tipnis=musc.edu@lists.osu.edu>
<b>On Behalf Of </b>Nicole Ranger via Intl_dxmedphys_wd_osu_list<br>
<b>Sent:</b> Thursday, September 17, 2026 11:57 AM<br>
<b>To:</b> Imendra Ranatunge <ranatunge@gmail.com><br>
<b>Cc:</b> kenharper14 via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list@lists.osu.edu><br>
<b>Subject:</b> Re: [Intl_DxMedPhys] RE_Siemens c.cam – Jaszczak Phantom Positioning<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">Imendra, No significant phantom tilt is required except to ensure the phantom is level, and there an adhoc shim using a folded paper towel would do the trick. I
typically place the phantom on a Chuck with the absorbent side up as a precaution<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"><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">Imendra, No significant phantom tilt is required except to ensure the phantom is level, and there an adhoc shim using a folded paper towel would do the trick. I
typically place the phantom on a Chuck with the absorbent side up as a precaution<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"revert",serif">Imendra,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"revert",serif"><br>
<br>
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"revert",serif">No significant phantom tilt is required except to ensure the phantom is level, and there an adhoc shim using a folded paper towel would do the trick. I typically place the phantom on a Chuck with
the absorbent side up as a precaution and if you roll the edges up to the phantom tightly that should be adequate to ensure no movement but you could always add tape being sure that it does not interfere with movement of the table axially, in/out. I believe
that the ACR now permits you to use auto-contouring so the collimator position is optimized at each angle. (If you use a circular orbit you have to center the phantom carefully to minimize collimator distance.) whichever option you use, you should ensure that
the phantom is centered in the FOV. I like to position the phantom so that the largest spheres are at the bottom but others may have a different positioning preference.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"revert",serif">Nicole R.</span><o:p></o:p></p>
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<br>
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"revert",serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sent from my iPhone<o:p></o:p></p>
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<br>
<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">On Sep 17, 2026, at 12:09 PM, Imendra Ranatunge 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:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"></span> <o:p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">Hi All, I have a question regarding performing a Jaszczak phantom test on a Siemens c.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">cam
system. Are there any special instructions or recommendations for positioning the Jaszczak phantom on the c.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">cam? My understanding
is that the phantom may<o:p></o:p></span></p>
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<p class="gmail-isselectedend">Hi All,<o:p></o:p></p>
<p class="gmail-isselectedend">I have a question regarding performing a Jaszczak phantom test on a Siemens c.cam system.<o:p></o:p></p>
<p class="gmail-isselectedend">Are there any special instructions or recommendations for positioning the Jaszczak phantom on the c.cam? My understanding is that the phantom may need to be tilted due to the geometry of the system.<o:p></o:p></p>
<p class="gmail-isselectedend">Is there a recommended setup or an easy, practical way to position and secure the phantom for the acquisition? I appreciate any guidance or experience you can share.<o:p></o:p></p>
<p class="gmail-isselectedend">Thank you!<o:p></o:p></p>
<p class="gmail-isselectedend">Imendra<o:p></o:p></p>
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