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<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-family:Calibri,sans-serif"><span lang="FR">Dear Castor
users,</span></p>
<p class="MsoNormal" style="text-align:justify;margin:0cm 0cm 8pt;line-height:107%;font-family:Calibri,sans-serif">I can reconstruct without problem
a list mode from an IEC phantom recorded on the Philips Vereos TEP (with and
without correction) when the sensitivity is calculated from the .geom scanner. However,
when the sensitivity is generated from a normalization file, it does not work
anymore. I have no idea where the problem may come from, especially since the
sensitivity image generated from the normalization file seems correct to me.<span></span></p>
<p class="MsoNormal" style="text-align:justify;margin:0cm 0cm 8pt;line-height:107%;font-family:Calibri,sans-serif">Here in attachement :</p><p class="MsoNormal" style="text-align:justify;margin:0cm 0cm 8pt;line-height:107%">
</p><p class="MsoNormal" style="font-family:Calibri,sans-serif;margin:0cm 0cm 8pt;font-size:small;text-decoration-style:initial;text-decoration-color:initial;line-height:13.91px">“SensiScan” : Sensitivity calculated from the scanner element without taking into account attenuation and normalization.</p><p class="MsoNormal" style="font-family:Calibri,sans-serif;margin:0cm 0cm 8pt;font-size:small;text-decoration-style:initial;text-decoration-color:initial;line-height:13.91px">“ReconWithSensiScan” : MLEM reconstruction with sensitivity “SensiScan” without any correction</p><p class="gmail-MsoListParagraph" style="font-family:Calibri,sans-serif;font-size:small;text-decoration-style:initial;text-decoration-color:initial;margin:0cm 0cm 8pt 36pt;line-height:13.91px"><span style="font-family:Wingdings"><span>è<span style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:normal;font-family:"Times New Roman""><span> </span></span></span></span>Gets reconstructed images which seems to me coherent considering the absence of correction<span></span></p><p class="MsoNormal" style="font-family:Calibri,sans-serif;margin:0cm 0cm 8pt;font-size:small;text-decoration-style:initial;text-decoration-color:initial;line-height:13.91px">“SensiNorm”: Sensitivity calculated from the normalization datafile without taking into account attenuation and normalization (attenuation and normalization factor set to 1)<span></span></p><p class="MsoNormal" style="font-family:Calibri,sans-serif;margin:0cm 0cm 8pt;font-size:small;text-decoration-style:initial;text-decoration-color:initial;line-height:13.91px">ReconWithSensiNorm : MLEM reconstruction with sensitivity “SensiNorm” without any correction<span></span></p><p class="gmail-MsoListParagraph" style="font-family:Calibri,sans-serif;font-size:small;text-decoration-style:initial;text-decoration-color:initial;margin:0cm 0cm 8pt 36pt;line-height:13.91px"><span style="font-family:Wingdings"><span>è<span style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:normal;font-family:"Times New Roman""><span> </span></span></span></span>Gets an almost uniform image with values very close to 0<span></span></p><p class="MsoNormal" style="font-family:Calibri,sans-serif;margin:0cm 0cm 8pt;font-size:small;text-decoration-style:initial;text-decoration-color:initial;line-height:13.91px">Do you think that the sensitivity image calculated with the normalization file seems correct? Have you ever encountered a similar problem?</p><p class="MsoNormal" style="margin:0cm 0cm 8pt;text-decoration-style:initial;text-decoration-color:initial;line-height:13.91px"><font face="Calibri, sans-serif">Any help will be welcome!</font><br></p><p class="MsoNormal" style="font-family:Calibri,sans-serif;margin:0cm 0cm 8pt;font-size:small;text-decoration-style:initial;text-decoration-color:initial;line-height:13.91px">Kind regards</p><p class="MsoNormal" style="font-family:Calibri,sans-serif;margin:0cm 0cm 8pt;font-size:small;text-decoration-style:initial;text-decoration-color:initial;line-height:13.91px">Julien Salvadori</p><p class="MsoNormal" style="font-family:Calibri,sans-serif;margin:0cm 0cm 8pt;font-size:small;text-decoration-style:initial;text-decoration-color:initial;line-height:13.91px">Phd student, IADI</p><p class="MsoNormal" style="font-family:Calibri,sans-serif;margin:0cm 0cm 8pt;font-size:small;text-decoration-style:initial;text-decoration-color:initial;line-height:13.91px"><br></p><p class="MsoNormal" style="font-family:Calibri,sans-serif;margin:0cm 0cm 8pt;font-size:small;text-decoration-style:initial;text-decoration-color:initial;line-height:13.91px"></p><div class="gmail_chip gmail_drive_chip" style="width:396px;height:18px;max-height:18px;background-color:rgb(245,245,245);padding:5px;font-family:arial;font-weight:bold;font-size:13px;border:1px solid rgb(221,221,221);line-height:1"><a href="https://drive.google.com/file/d/1oU9veGi2I5sE8fS0-aeutq0HsUeTFn-Y/view?usp=drive_web" target="_blank" style="display:inline-block;max-width:366px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-decoration:none;padding:1px 0px;border:none"><img style="vertical-align: bottom; border: none;" src="https://ssl.gstatic.com/docs/doclist/images/icon_10_generic_list.png"> <span dir="ltr" style="color:rgb(17,85,204);text-decoration:none;vertical-align:bottom">1.zip</span></a><img src="//ssl.gstatic.com/ui/v1/icons/common/x_8px.png" style="display: none; opacity: 0.55; cursor: pointer; float: right; top: -1px;"></div><br><p></p>
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