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<p class="MsoNormal">Dear Castor users,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am trying to convert the raw PET data (list-mode) from Phillips Gemini TF 64 to Castor format. Currently, I can read the pair of crystal indexes (transvers and axial) from Gemini data, and then use them to generate the crystal IDs to
the corresponding events. I converted the PET data to the Castor formats (both list-mode and histogram) by using the crystal IDs from Gemini. However, I found the orientation difference between castor reconstruction and PET console reconstruction. I have tried
to change the “resections first angle” in the geom file to match the rotation, but the castor image is still flipped (left-right and superior-inferior). I am not sure whether this image flip is related to the indexation direction (eg. clock-wise v.s. counter
clock-wise) between castor and Gemini. The mismatch orientation between then castor image and CT attenuation map (in Gemini orientation ) makes attenuation correction difficult.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Does anyone know the details of Gemini’s crystal indexation? So, I can convert the crystals IDs to the castor indexation. Or, is it possible to derive the sinogram of attenuation file from scanner (similar to Siemens machines by using e7tools)?
or What other options to solve this issue.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I appreciate your help.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best Regards,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="vertical-align:baseline"><b><span style="font-size:12.0pt;color:black">Shenpeng Li, PhD.</span></b><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><span style="font-size:10.0pt;font-family:inherit;color:#201F1E;border:none windowtext 1.0pt;padding:0cm">CERC Postdoctoral Fellow</span><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#323130"><o:p></o:p></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#323130"><o:p> </o:p></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><b><span style="font-size:10.0pt;font-family:inherit;color:#323130;border:none windowtext 1.0pt;padding:0cm">Health and Biosecurity, The Australian e-Health Research Centre, CSIRO</span></b><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#323130"><o:p></o:p></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><span style="font-size:10.0pt;font-family:inherit;color:#323130;border:none windowtext 1.0pt;padding:0cm">343 Royal Parade, Parkville, Victoria 3052, Australia<o:p></o:p></span></p>
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<p class="MsoNormal" style="vertical-align:baseline"><b><span style="font-size:10.0pt;font-family:inherit;color:#323130;border:none windowtext 1.0pt;padding:0cm">Dept of Nuclear Medicine and Centre for PET, Austin Hospital</span></b><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#323130"><o:p></o:p></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><span style="font-size:10.0pt;font-family:inherit;color:#323130;border:none windowtext 1.0pt;padding:0cm">LVL1 Harrold STOKES Block, 145 Studley Road, Heidelberg, Victoria <span style="background:white">3084,</span> Australia<br>
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<p class="MsoNormal" style="background:white;vertical-align:baseline"><b><span style="font-size:9.0pt;color:black;border:none windowtext 1.0pt;padding:0cm;background:white">PLEASE NOTE</span></b><span style="font-size:9.0pt;color:black;border:none windowtext 1.0pt;padding:0cm;background:white"><br>
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permitted by law, CSIRO does not represent, warrant and/or guarantee that the integrity of this communication has been maintained or that the communication is free of errors, virus, interception or interference.<o:p></o:p></span></p>
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