<div dir="ltr">Dear Li,<div><br></div><div>For the Vereos PET scanner, the detection elements are arranged transversely in the CCW direction and the angular position of the first module with respect to the y-axis is - 80° (see figure).<br><br><div><img src="cid:ii_kghmyskw0" alt="image.png" width="407" height="213"><br></div><br>If the convention is the same for the Ingenuity, you can try :<br>rotation direction: CCW<br>rsectors first angle : -80°.<br></div><div><br></div><div>Hope this helps, </div><div><br></div><div>Julien Salvadori <br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le mar. 20 oct. 2020 à 01:55, Li, Shenpeng (H&B, Parkville) <Shenpeng.Li@csiro.au> a écrit :<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 lang="EN-AU">
<div class="gmail-m_-62694170844131404WordSection1">
<p class="MsoNormal">Dear Castor users,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></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.
<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></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.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I appreciate your help.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Best Regards,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal" style="vertical-align:baseline"><b><span style="font-size:12pt;color:black">Shenpeng Li, PhD.</span></b><span style="font-size:12pt;color:black"><u></u><u></u></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><span style="font-size:10pt;font-family:inherit;color:rgb(32,31,30);border:1pt none windowtext;padding:0cm">CERC Postdoctoral Fellow</span><span style="font-size:12pt;font-family:"Segoe UI",sans-serif;color:rgb(50,49,48)"><u></u><u></u></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><span style="font-size:12pt;font-family:"Segoe UI",sans-serif;color:rgb(50,49,48)"><u></u> <u></u></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><b><span style="font-size:10pt;font-family:inherit;color:rgb(50,49,48);border:1pt none windowtext;padding:0cm">Health and Biosecurity, The Australian e-Health Research Centre, CSIRO</span></b><span style="font-size:12pt;font-family:"Segoe UI",sans-serif;color:rgb(50,49,48)"><u></u><u></u></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><span style="font-size:10pt;font-family:inherit;color:rgb(50,49,48);border:1pt none windowtext;padding:0cm">343 Royal Parade, Parkville, Victoria 3052, Australia<u></u><u></u></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><span style="font-size:12pt;font-family:"Segoe UI",sans-serif;color:rgb(50,49,48)"><u></u> <u></u></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><b><span style="font-size:10pt;font-family:inherit;color:rgb(50,49,48);border:1pt none windowtext;padding:0cm">Dept of Nuclear Medicine and Centre for PET, Austin Hospital</span></b><span style="font-size:12pt;font-family:"Segoe UI",sans-serif;color:rgb(50,49,48)"><u></u><u></u></span></p>
<p class="MsoNormal" style="vertical-align:baseline"><span style="font-size:10pt;font-family:inherit;color:rgb(50,49,48);border:1pt none windowtext;padding:0cm">LVL1 Harrold STOKES Block, 145 Studley Road, Heidelberg, Victoria <span style="background:white">3084,</span> Australia<br>
<br>
</span><span style="font-size:12pt;font-family:"Segoe UI",sans-serif;color:rgb(50,49,48)"><u></u><u></u></span></p>
<p class="MsoNormal" style="background:white;vertical-align:baseline"><b><span style="font-size:9pt;color:black;border:1pt none windowtext;padding:0cm;background:white">PLEASE NOTE</span></b><span style="font-size:9pt;color:black;border:1pt none windowtext;padding:0cm;background:white"><br>
The information contained in this email may be confidential or privileged. Any unauthorised use or disclosure is prohibited. If you have received this email in error, please delete it immediately and notify the sender by return email. Thank you. To the extent
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.<u></u><u></u></span></p>
<p class="MsoNormal" style="background:white;vertical-align:baseline"><i><span style="font-size:9pt;color:black;border:1pt none windowtext;padding:0cm;background:white">Please consider the environment before printing this email.</span></i><span style="font-size:9pt;color:black;border:1pt none windowtext;padding:0cm;background:white"><u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div>
_______________________________________________<br>
Castor-users mailing list<br>
<a href="mailto:Castor-users@lists.castor-project.org" target="_blank">Castor-users@lists.castor-project.org</a><br>
<a href="http://lists.castor-project.org/listinfo/castor-users" rel="noreferrer" target="_blank">http://lists.castor-project.org/listinfo/castor-users</a><br>
</blockquote></div>